Baptisia lactea
Baptisia australis
western white indigo
blue wild indigo
petiolate;
stipules caducous, lanceolate, 2–8 mm;
petiole 5–15 mm;
leaflets 3, blades obovate.
petiolate;
stipules mostly persistent, lanceolate to ovate-lanceolate, 3–15 mm;
petiole 4–12 mm;
leaflets 3, blades obovate to oblanceolate.
8–20-flowered, terminal, stiffly erect, ebracteate.
8+-flowered, terminal, bracteate, bracts caducous.
3–10 mm.
5–12 mm.
18–25 mm;
calyx 7–8 mm, glabrous;
corolla white, 16–23 mm.
22–26 mm;
calyx 8–12 mm, glabrous;
corolla dull violet to deep blue, 20–24 mm.
black in age, ascending to spreading-pendent, plump, ellipsoid-cylindric, 23–50 × 10–30 mm, smooth.
erect to ascending-divergent, ellipsoid-oblong to asymmetric-ovoid, 30–50 × 10–30 mm, leathery becoming brittle, glabrous.
20–30.
20–30.
= 18.
Baptisia lactea
Baptisia australis
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.)
Varieties 2 (2 in the flora).
(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 |
1. Legumes 10–20 mm wide; stipes 4–8 mm in fruit; ne United States. | var. australis |
1. Legumes much inflated, 20–30 mm wide; stipes 8–12 mm in fruit; Ontario and sc United States. | var. minor |
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