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eastern redbud, redbud

Habit Shrubs or trees.
Stems

gray-brown to red-brown, twigs glabrous or tomentose.

Leaves

petiole 10–50 mm, glabrous or hairy;

blade dull to dark green, membranous, subcoriaceous, or coriaceous, thickened (0.15–0.3 mm) or thin (0.05–0.25 mm), blades cordate, suborbiculate, orbiculate, or reniform, 24–110 ×20–116 mm, base nearly truncate to cordate, margins flat or sinuate, veins 5–9, palmate, prominent, apex obtuse to acuminate, sometimes retuse, surfaces glabrous or hairy abaxially, sometimes restricted to veins or vein axils, glabrous adaxially, sometimes glossy.

Pedicels

glabrous or hairy.

Flowers

calyx 5–7.6 mm wide;

petals usually pink, rarely white, nectar guides magenta, banner 4.4–6.5 × 3–5.8 mm, wings 4.5–7.1 ×3.2–4.8 mm, keel 6.5–9.5 × 4.3–7 mm.

Legumes

dull brown, magenta, or red-brown, 48–109 × 7–21 mm, winged on abaxial suture, sometimes glossy, waxy, surfaces glabrous or hairy.

Cercis canadensis

Distribution
from USDA
North America; n Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Leaf blades thin (0.05–0.25 mm) to subcoriaceous, margins flat, apex acuminate or obtuse, surfaces usually dull (sometimes slightly reflective but not glossy), glabrous or hairy abaxially, glabrous adaxially; s Canada, c, e United States.
subsp. canadensis
1. Leaf blades thickened (0.15–0.3 mm), coriaceous, margins distinctly sinuate, apex obtuse to retuse, surfaces dull or glossy adaxially, glabrous or hairy abaxially and adaxially; arid regions of Oklahoma, Texas.
→ 2
2. Leaf blade abaxial surface, petiole, and twigs tomentose, adaxial surface, flower pedicel, and legumes sparsely hairy, leaf blades averaging 59 × 56 mm; sw Texas in arid environments.
subsp. mexicana
2. Leaf blade abaxial surface, petiole, and twigs glabrous, adaxial surface (glossy), flower pedicel, and legumes glabrous; leaf blades averaging 72 × 75 mm; Oklahoma (Arbuckle Mountains) to w Texas (limestone formations of Edwards Plateau).
subsp. texensis
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Cercidoideae > Cercis
Sibling taxa
C. occidentalis, C. orbiculata
Subordinate taxa
C. canadensis subsp. canadensis, C. canadensis subsp. mexicana, C. canadensis subsp. texensis
Synonyms Siliquastrum canadense
Name authority Linnaeus: Sp. Pl. 1: 374. (1753)
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