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lanceleaf rattlebox

Photo is of parent taxon
Habit Herbs annual or short-lived perennial.
Stems

erect, 30–150 cm, strigillose to strigose-hirsute.

Leaves

3-foliolate;

stipules absent;

leaflet blades linear to linear-lanceolate or lanceolate, 40–110(–150) mm, length 5–10 times width, surfaces sparsely strigose abaxially, glabrous adaxially.

Racemes

12–26(–40)-flowered, terminal, subterminal, or lateral, 10–35 cm;

bracts persistent, subulate or filiform, 0.5–3 mm, basally expanded.

Flowers

calyx broadly cylindrical, truncate basally and deflexed against pedicel, 2.5–4 mm, lobes subulate to triangular-acuminate, usually shorter than tube, shiny-glabrous or glabrate;

corolla yellow with faint reddish purple lines, often dark purple basally, 8–11 mm.

Legumes

(16–)18–38 × 4–6 mm, tip upcurved, strigose.

2n

= 16.

Crotalaria lanceolata

Crotalaria lanceolata subsp. lanceolata

Phenology Flowering Jul–Nov, Jan–Apr (year-round).
Habitat Sandy fields, sandhills, roadsides, ditches, river and swamp edges, woodland edges, disturbed areas, pine flatwoods, palm-live oak woods.
Elevation 0–20 m. (0–100 ft.)
Distribution
from USDA
Africa [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; FL; GA; LA; NC; SC; Africa; Indian Ocean Islands (Madagascar) [Introduced in North America; introduced also in South America (Colombia), e Asia (Taiwan), Pacific Islands (Hawaii), Australia]
Discussion

Subspecies 3–5 (1 in the flora).

Subspecies exigua Polhill and subsp. prognatha Polhill are known from Africa.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Crotalaria Fabaceae > subfam. Faboideae > Crotalaria > Crotalaria lanceolata
Sibling taxa
C. avonensis, C. incana, C. juncea, C. ochroleuca, C. pallida, C. pumila, C. purshii, C. retusa, C. rotundifolia, C. sagittalis, C. spectabilis, C. trichotoma, C. verrucosa, C. virgulata
Subordinate taxa
C. lanceolata subsp. lanceolata
Name authority E. Meyer in E. Meyer and J. F. Drège: Comm. Pl. Afr. Austr., 24. (1836) unknown
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