Crotalaria ochroleuca
Crotalaria pumila
slender leaf rattlebox
low rattlebox
erect, 70–250 cm, strigose.
sometimes ligneous basally, mostly decumbent to prostrate, 15–100 cm, minutely and sparsely strigillose.
3-foliolate;
stipules absent;
leaflet blades linear to linear-lanceolate or elliptic-lanceolate, 50–130(–180) mm, length 7–10 times width, surfaces strigose abaxially, glabrous adaxially.
3-foliolate;
stipules caducous, narrowly triangular, setaceous, 0.5–1 mm;
leaflet blades narrowly obovate to oblong or elliptic-oblong, 7–15(–35) mm, length 1.5–3.5(–6) times width, surfaces strigose abaxially, glabrous adaxially.
4–12-flowered, terminal or subterminal, 15–40 cm;
bracts persistent, linear-triangular, minute.
(1–)4–8-flowered, terminal, subterminal, or lateral, 1–6(–10) cm;
bracts caducous, subulate.
calyx broadly cylindrical, truncate basally, 4–6 mm, lobes triangular, shiny-glabrous;
corolla pale yellow with prominent reddish purple lines, 18–20 mm.
calyx campanulate, 3–5.5 mm, lobes triangular, strigose;
corolla yellow, often red- or orange-tinged or red-lined, 7–11 mm.
straight, (40–)50–70 × (10–)15–20 mm, sparsely strigose or glabrescent.
yellowish, 12–20 × 4–8 mm, minutely strigillose.
= 16.
= 32.
Crotalaria ochroleuca
Crotalaria pumila
Crotalaria ochroleuca has often been identified in the United States as C. intermedia Kotschy or C. brevidens Bentham var. intermedia (Kotschy) Polhill.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Plants of Crotalaria pumila in the south-central and southwestern United States tend to have more elongate leaflets than those from Florida and are often found on grassy hillsides, creek bottoms, and in alluvium, from 1100–1800 m; flowering is from August to October. In Florida, it is found in low elevation, mostly sandy habitats, and flowers from December to May. It was collected on chrome ore piles in Baltimore, Maryland, in the 1950s but did not become established there. A record cited by H. A. Senn (1939) attributed to Utah is doubtful, and no subsequent specimens have been reported from that state.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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