Baptisia perfoliata
Baptisia tinctoria
cat-bells
horseflyweed, yellow wild indigo
sessile;
stipules absent;
leaflet 1, blade perfoliate, broadly ovate-elliptic.
shortly petiolate or subsessile;
stipules deciduous, minute;
leaflets 3, blades obovate-cuneate to spatulate.
1-flowered, axillary, ebracteate.
6+-flowered, terminal, long-exserted, bracteate, bracts caducous.
absent.
3–5 mm.
15–17 mm;
calyx 5–7 mm, glabrous;
corolla bright yellow, 13–15 mm.
14–18 mm;
calyx 4–5 mm, glabrous or glabrate;
corolla yellow, 12–16 mm.
ascending, ovoid, 10–15 × 8–12 mm, abruptly beaked, woody.
exserted-stipitate, erect, ovoid to ellipsoid, 8–15 × 5–9 mm, ± woody.
2–4.
6–8.
= 18.
= 18.
Baptisia perfoliata
Baptisia tinctoria
Baptisia perfoliata forms hybrids with B. alba, B. lanceolata, and B. tinctoria; F1 hybrids with the latter are called B. × microphylla Nuttall.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Baptisia tinctoria forms hybrids with B. alba (= B. × serenae M. A. Curtis), B. lactea (B. × deamii Larisey), and B. perfoliata (B. × fulva Larisey [= B. × microphylla Nuttall]). Within Baptisia, B. tinctoria and the unifoliolate-leaved species form an isolated clade (M. G. Mendenhall 1994).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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