Baptisia lactea
Baptisia arachnifera
western white indigo
cobwebby wild indigo
petiolate;
stipules caducous, lanceolate, 2–8 mm;
petiole 5–15 mm;
leaflets 3, blades obovate.
sessile;
stipules absent or appearing so;
leaflet 1, blade broadly ovate, surfaces with cobwebby hairs.
8–20-flowered, terminal, stiffly erect, ebracteate.
8–12-flowered, terminal, bracteate.
3–10 mm.
2 mm.
18–25 mm;
calyx 7–8 mm, glabrous;
corolla white, 16–23 mm.
11–13 mm;
calyx 4–5 mm, pubescent;
corolla yellow, 9–11 mm.
black in age, ascending to spreading-pendent, plump, ellipsoid-cylindric, 23–50 × 10–30 mm, smooth.
ascending, suborbicular to broadly lanceoloid, 8–12 × 6–9 mm, beaks attenuate, somewhat woody, tomentose.
20–30.
2–4.
Baptisia lactea
Baptisia arachnifera
Varieties 2 (2 in the flora).
Baptisia lactea forms hybrids with B. lanceolata, B. nuttalliana, B. sphaerocarpa (B. × sulphurea Engelmann), and B. tinctoria (B. × deamii Larisey).
Peripheral intergradation between var. lactea and var. pendula occurs (hence their treatment as varieties); they are not known to co-occur at present.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Baptisia arachnifera is known only from Brantley and Wayne counties.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Legumes 10–15 mm wide; mature stipes about as long as calyces; c United States. | var. lactea |
1. Legumes 15–30 mm wide; mature stipes much longer than calyces; se United States. | var. pendula |
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