Baptisia lactea
Baptisia nuttalliana
western white indigo
Nuttall's wild indigo
petiolate;
stipules caducous, lanceolate, 2–8 mm;
petiole 5–15 mm;
leaflets 3, blades obovate.
sessile or subsessile;
stipules caducous, small;
leaflets 3, blades elliptic to obovate.
8–20-flowered, terminal, stiffly erect, ebracteate.
1(–3)-flowered, solitary or clustered, axillary, ebracteate.
3–10 mm.
2–5 mm.
18–25 mm;
calyx 7–8 mm, glabrous;
corolla white, 16–23 mm.
17–22 mm;
calyx 5–8 mm, pubescent;
corolla yellow, 15–20 mm.
black in age, ascending to spreading-pendent, plump, ellipsoid-cylindric, 23–50 × 10–30 mm, smooth.
ascending, ovoid, 8–14 × 8–12 mm, ± woody.
20–30.
8–12.
= 18.
Baptisia lactea
Baptisia nuttalliana
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 nuttalliana forms occasional hybrids with B. lactea, B. leucophaea, and B. sphaerocarpa, especially in eastern Texas where these taxa are sympatric.
(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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