Flowers to 14 mm wide, solitary or clustered in short axillary racemes or terminal panicles (ATF 2204)
Chamaecrista nictitans (L.) Moench
Chamaecrista nictitans (L.) Moench subsp. nictitans var. aspera (Muhl. ex Elliott) H.S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. nictitans var. diffusa (DC.) H.S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. disadena (Steud.) H. S. Irwin & Barneby var. disadena (Steud.) H. S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. patellaria (DC. ex Collad.) H. S. Irwin & Barneby var. glabrata (Vogel) H. S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. nictitans var. jaliscensis (Greenm.) H. S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. nictitans var. leptadenia (Greenm.) Gandhi & S. L. Hatch
Chamaecrista nictitans (L.) Moench subsp. nictitans var. nictitans
Chamaecrista nictitans (L.) Moench subsp. patellaria (DC. ex Collad.) H. S. Irwin & Barneby var. paraguariensis (Chodat & Hassl.) H. S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. patellaria (DC. ex Collad.) H. S. Irwin & Barneby var. patellaria (DC. ex Collad.) Kartesz & Gandhi
Chamaecrista nictitans (L.) Moench subsp. disadena (Steud.) H. S. Irwin & Barneby var. pilosa (Benth.) H. S. Irwin & Barneby
Chamaecrista nictitans (L.) Moench subsp. patellaria (DC. ex Collad.) H. S. Irwin & Barneby var. praetexta (Vogel) H. S. Irwin & Barneby
subsp. brachypoda: Basionym: Cassia brachypoda Benth.
subsp. disadena: Chamaecrista stenocarpa (Vogel) Standl.
subsp. nictitans var. aspera: Basionym: Cassia aspera Muhl. ex Elliott; Cassia simpsonii Pollard; Chamaecrista simpsonii (Pollard) A. Heller
subsp. nictitans var. diffusa: Basionym: Cassia diffusa DC.
subsp. disadena var. disadena: Basionym: Cassia disadena Steud.
subsp. disadena var. pilosa: Basionym: Cassia riparia var. pilosa Benth.
subsp. nictitans var. jaliscensis: Basionym: Cassia leptadenia var. jaliscensis Greenm.
subsp. nictitans var. leptadenia: Basionym: Cassia leptadenia Greenm.; Cassia leptadenia var. mensalis Greenm.; Chamaecrista leptadenia (Greenm.) Cockerell; Chamaecrista nictitans var. mensalis (Greenm.) H.S. Irwin & Barneby
subsp. nictitans var. nictitans: Basionym: Cassia nictitans L.; Cassia nictitans var. mohrii (Pollard) J.F. Macbr.
subsp. patellaria var. glabrata: Basionym: Cassia patellaria var. glabrata Vogel; Cassia aeschinomene DC. ex Collad.; Cassia lechenaultiana DC. (not to be confused with Cassia leschenaultiana DC., which is a synonym of Chamaecrista leschenaultiana (DC.) O. Deg.); Chamaecrista aeschinomene (DC. ex Collad.) Greene
subsp. patellaria var. paraguariensis: Basionym: Cassia flavicoma var. paraguariensis Chodat & Hassl.
subsp. patellaria var. patellaria: Basionym: Cassia patellaria DC. ex Collad.; Cassia patellaria var. ramosa Vogel; Chamaecrista nictitans var. ramosa (Vogel) H.S. Irwin & Barneby; Chamaecrista patellaria (DC. ex Collad.) Greene
subsp. patellaria var. praetexta: Basionym: Cassia praetexta Vogel; Chamaecrista lucesiae Pittier
Family: Fabaceae (alt. Leguminosae) subfamily: Caesalpinioideae tribe: Cassieae subtribe: Cassiinae.
Annual, occasionally short-lived perennial, with a more or less woody base (subshrub). Stems herbaceous, decumbent, ascendant to erect 10‒50 (‒150) cm in height; glabrous to densley appressed-puberulent with incurved trichomes. Leaves alternate, unipinnate, thigmonastic (sensitive to touch); petiole 4‒9 mm long, pubescent; slender-stalked umbrella-shaped gland, about 0.4‒0.8 mm in diameter on the petiole immediately below basal pinnae (size and shape of the gland is diagnostic between varieties); rachis 5‒12 cm long; stipules green, triangulate to lanceolate or foliaceous, persistent, free. Pinnae in (6‒) 10‒20 (‒30) opposite pairs; linear oblong, 4‒15 × 2‒3 mm, pinnate venation, margin entire, mucronate; basal pinnae longer than terminal pinnae. Flowers perfect, 8‒10 (‒14) mm wide, solitary or clustered in short axillary racemes or terminal panicles of 2‒6 flowers; pedicels 1‒4 mm long; sepals 5, lanceolate, 3‒4 mm long, acuminate; petals 5, bright yellow (rarely pale yellow), the lowermost sometimes 6‒8 mm long and about twice as large as the other four. Fruit linear oblong, 20‒40 (‒60) mm long, 3‒6 mm broad, glabrous to most commonly densely appressed-puberulent, rarely villous, 3‒10 seeded; elastically dehiscent along both sutures. Seeds subquadrate, surface smooth, brown to black when mature. 455,000 seeds/kg.
C. nictitans: flowers 8‒10 (‒14) mm wide borne on pedicels 1‒4 mm long
C. fasciculata: flowers 25‒40 mm wide borne on pedicels 8‒15 mm long
Asia: sa-kham-khom (Thailand); nroj kua dis (Hmong, Vietnam)
English: Japanese tea senna, partridge pea (more appropriately applied to C. fasciculata), pinnata cassia, sensitive partridge-pea, sensitive-pea, small partridge pea, wild sensitive-plant.
Pacific: lauki (Hawaii)
Latin America: canela-de-ema, dorme-dorme, falsa-dormideira, falsa-sensitiva, fedegoso-de-folha-miúda, malícia, malícia-de-mulher, maria-dorme-dorme, mata-pasto, peninha, peninha-sensitiva (Brazil); moriviví bobo, tamarindillo (Spanish)
South America: Bolivia (Santa Cruz); Brazil (Mato Grosso, Minas Gerais, Para, São Paulo); Paraguay
Northern America: Mexico (Chiapas, Guerrero, Jalisco, Michoacán, Nayarit, Oaxaca, Tamaulipas, Veracruz)
Central America: Costa Rica; El Salvador; Guatemala; Honduras; Nicaragua; Panama
South America: Bolivia; Brazil (Amazonas, Bahia, Ceará, Espírito Santo, Maranhão, Mato Grosso, Minas Gerais, Paraná, Pernambuco, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, São Paulo); Colombia; Ecuador (Cotopaxi); Guyana; Paraguay; Peru (Lambayeque); Suriname; Venezuela
Northern America: Mexico (Baja Norte, Baja Sur, Campeche, Chiapas, Chihuahua, Durango, Guerrero, Jalisco, Michoacán, Nayarit, Oaxaca, Querétaro, Quintana Roo, Sinaloa, Sonora, Tabasco, Tamaulipas, Veracruz, Yucatán, Zacatecas); U.S.A. (Alabama, Arkansas, Connecticut, Florida, Georgia, Illinois. Indiana, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Mississippi, Missouri, New Hampshire, New Mexico, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Texas, Tennessee, Vermont, Virginia, West Virginia, Wisconsin)
Caribbean: Aruba; Bahamas; Cuba; Grenada; Guadeloupe; Hispaniola; Jamaica; Netherlands Antilles; Puerto Rico; St. Kitts and Nevis; St. Vincent and Grenadines; Virgin Islands (British); Virgin Islands (U.S.)
Central America: Belize; Costa Rica; El Salvador; Guatemala; Honduras; Nicaragua; Panama
South America: Argentina (Jujuy, Salta); Colombia; Ecuador (Guayas, Loja); Peru (Piura, Tumbes); Venezuela (Falcón, Miranda, Nueva Esparta, Federal District, Lara)
Northern America: Mexico (Chiapas, Guerrero, Oaxaca, San Luis Potosí, Tabasco, Veracruz)
South America: Brazil (Amapá, Amazonas, Bahia, Ceará, Maranhão, Mato Grosso do Sul, Minas Gerais, Pará, Paraná, Pernambuco, Rio de Janeiro, Rio Grande do Sul, Rondônia, Santa Catarina, São Paulo)
Caribbean: Cuba; Guadeloupe; Hispaniola; Jamaica; Martinique; Puerto Rico; Trinidad and Tobago (Trinidad)
Central America: Belize; Costa Rica; El Salvador; Guatemala; Honduras; Nicaragua; Panama
South America: Argentina (Chaco, Corrientes, Formosa, Misiones); Bolivia; Colombia; French Guiana; Guyana; Paraguay; Peru; Suriname; Venezuela
Tropical & subtropical Asia & elsewhere. The subspecies and varieties are endemic to specific and diverse climatic regions, extending from northern USA to northern Argentina, roughly 45º N to about 28º S. The diversity of endemic origin of the subtaxa suggests significant genetic variability within the species. The most common variety naturalized in the wet tropics is Chamaecrista nictitans (L.) Moench subsp. patellaria (DC. ex Collad.) H.S. Irwin & Barneby var. glabrata (Vogel) H.S. Irwin & Barneby
It is used as a self-seeding green manure for humid, low altitude tropics, and can also function as a soil stabilizer.
Provides a good pollen source for bees, and while claimed to be used to make a tea, "kobo-cha" and "nemu-cha", in Japan, this may also be attributable to Chamaecrista leschenaultiana (DC.) O. Deg. rather than Chamaecrista lechenaultiana (DC.), a synonym of C. nictitans var. glabrata. Extracts shown to exhibit antiviral activity against herpes simplex virus. Also claimed to have medicinal value as a remedy for stomach ache and fever.
Found in open woods prairies, thickets, wet or dry shores, on sandy soils, commonly in disturbed habitats.
Native to a wide range of soil types but most prevalent on free-draining sands of acid to neutral reaction. While recorded pH at collection sites varies from 5.5 to 7, the values represent a small sample and do not necessarily represent the soil reaction limitations for this particularly diverse species.
Annual rainfall at collection sites varies from 700 mm in Mexico to 2,400 mm in Panama, sometimes with a pronounced 6 or 7 month dry season.
Various subtaxa of the species are found from about 28º S in Argentina to about 45º N in USA. Average annual temperature at native sites or collection sites varies from less than 10 ºC in northern USA to 15 ºC at 2,850 m asl in Bolivia and 27 ºC at 490 m asl in Indonesia.
C. nictitans can be found growing in open situations and in light shade in savanna and forest, but not in dense shade.
Flowers July to September in its northern hemisphere native range. Seed has been collected in the southern hemisphere as early as February and as late as July, but most frequently in April and May.
Persistent in cutting trials, but may be better treated as an annual when used as a cut-and-carry forage in sub-tropical environments. As with most subshrubs, taller varieties are best cut at 20‒30cm to assist regrowth. Recruitment from seed is possible if there is bare ground, but grasses and weeds progressively invade pure swards.
No information available, but providing seed is set before the advent of fire, like most annuals, it may well thrive due to heat breakdown of dormancy.
Scarified seed germinates quickly after rainfall, but hard seed in the soil requires weathering to break the integrity of the seed coat to enable germination. Seedlings grow rapidly and early-flowering types can flower within 6 weeks. Chamaecrista spp. appear to be promiscuous in their rhizobium requirements and often nodulate with native rhizobia belonging to the slow-growing cowpea miscelany. However, inoculating with a broad spectrum strain such as CB756 can provide a measure of insurance if in doubt.
While C. nictitans can grow in less fertile soils, it may respond to fertilizers as indicated from soil test results. Successful establishment into acid red soils in China was achieved with a luxury application of 750 kg/ha lime, 25 kg/ha N, 40 kg/ha P and 50 kg/ha K.
Has most potential as a single species grown in a fodder bank for use as cut-and-carry.
Seed eaten by birds. Leaves eaten by the larvae of the cloudless sulphur butterfly (Phoebis sennae) and the ceraunus blue butterfly (Hemiargus ceraunus) in Texas. Plants killed by an anthracnose disease when in flower.
Recruits readily from seed.
No information available.
For highest nutritive value for hay production, harvest at early flowering when leaf percentage and crude protein content are high. CP levels of 16 - 22 % has been measured. It does, however, contain high levels of condensed tannins.
C. nictitans is readily grazed by cattle, buffalo, horses and goats, the latter preferring C. nictitans over C. rotundifolia cv. Wynn.
Not available at time of publication.
High yield potential as a cut-and-carry forage in acid-infertile, sub-tropical environments, including those with cold winters. Maximum production is likely to be achieved by replanting each year, rather than by locking up to produce seed.
No trials have been conducted to assess animal production. Is grazed by a range of herbivores in its native range.
No information available.
Unknown. Likely to be similar to C. rotundifolia.
Hacker, J.B., Shilin, W., Zhaoyang, Y. and Pengelly, B.C. (2001) Selecting Chamaecrista spp. for soil stabilisation and forage in southern China. Tropical Grasslands 35:96–113. bit.ly/2UleaPv
Luo, T., Weng, B., Lin, Y., Huang, D. and Wang F. (2003) Dynamics of dry-matter yields and NPK contents in three species of Cassia. Acta Prataculturae Sinica 12:94–98.
No cultivars officially released, although seed of adventive C. nictitans ssp. patellaria var. glabrata is sown as green manure and forage in tropical areas.
ATF 2217, ATF 2219 Selected in Fujian Province, China. Origin Paraguay, 25º30' S and 27º05' S respectively, in pH 6 soil. Showed promise as cut-and-carry forages, re-establishing from seed and producing good yields in the acid-infertile red soils. ATF 2217 survived the winter at about 26º N.