Crotalaria nigricans Baker
var. erecta Milne-Redh.

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Synonyms:
Common names:
Frequency:
Status: Native
Description:
Prostrate to erect perennial herb, much branched, branches up to 1.5 m long, with fine spreading hairs; leaves 3-foliolate, petioles 2-6 mm long; leaflets 1-3 x 0.5-1.2 cm, oblanceolate to oblong-obovate, sparsely pubescent above and thinly hairy beneath; stipules 3-6 mm long, lanceolate; flowers in 4-12 sessile or shortly pedunculate terminal heads; bracts 4-9 mm, ovate; calyx 4 lobed, 8-13 mm long, almost enclosing the corolla, pubescent, lobes 2-3 times as long as tube; standard circular-ovate to oblate, usually pale yellow, reddish-tinged and puberulous along the midvein outside towards the apex; wings longer than keel; keel 8-10 mm long, rounded about the middle and with a short incurved beak; pod enveloped by calyx, sessile, 7-10 mm long, ellipsoid, spreading hairy, c. 4-8 seeded; seeds c. 2.5 mm long, obliquely cordiform, smooth, mauvish-brown.
Var. erecta differs in having bushy, more or less erect stems forming a clump 0.7-1.5 m tall and inflorescences well above the ground.
Type location:
Tanzania
Notes:
Derivation of specific name: nigricans: blackish, presumably referring to the tendency of the plants to turn blackish upon drying in the press.
erecta: erect or upright
Habitat: Miombo woodland, particularly sandy places where a little additional water collects and in grasslands by streams and on flood plains.
Altitude range:
Flowering time:Apr - Sep
Worldwide distribution: DRC (Katanga), Tanzania and Zambia.
Zambian distribution (Flora Zambesiaca): W
Zambian distribution (Provinces): Nw
Growth form(s): Perennial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Literature:

Martins, E.S. et al. (2003). Papilionoideae Flora Zambesiaca 3(7) Pages 130 - 132.

Other sources of information about Crotalaria nigricans var. erecta:

External websites:

African Plants: A Photo Guide (Senckenberg): Crotalaria nigricans
BHL (Biodiversity Heritage Library): Crotalaria nigricans
EOL (Encyclopedia of Life): Crotalaria nigricans
GBIF (Global Biodiversity Information Facility): Crotalaria nigricans
Google: Web - Images - Scholar
iNaturalist: Crotalaria nigricans
IPNI (International Plant Names Index): Crotalaria nigricans
JSTOR Plant Science: Crotalaria nigricans
Mansfeld World Database of Agricultural and Horticultural Crops: Crotalaria nigricans
Plants of the World Online: Crotalaria nigricans
Tropicos: Crotalaria nigricans
Wikipedia: Crotalaria nigricans


Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-24

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2024). Flora of Zambia: Species information: Crotalaria nigricans var. erecta.
https://www.zambiaflora.com/speciesdata/species.php?species_id=198150, retrieved 29 March 2024

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