Cercis canadensis
Cercis
eastern redbud, redbud
redbud
gray-brown to red-brown, twigs glabrous or tomentose.
gray or gray-brown to red-brown, twigs dark red-brown, erect, hairy or glabrous.
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.
alternate, 2-ranked, unifoliolate;
stipules present, caducous, ovate, membranous; petiolate, petiole glabrous or hairy; pulvinate proximally and distally;
blade margins entire, surfaces glabrous or hairy.
cauliflorous or from short shoots on wood one year or older, fasciculate;
bracts present, caducous.
glabrous or hairy.
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.
pseudopapilionaceous, appearing before leaves, banner enclosed by wings, wings enclosed by keel petals;
calyx slightly zygomorphic, enlarged adaxially, persistent, lobes 5, connate, magenta, rounded to broadly triangular;
corolla: petals 5, free, clawed, usually pink, rarely white, [magenta], inserted on floral cup;
keel locked abaxially by folds in each petal forming a pocket;
stamens 10, distinct, enclosed in keel pocket;
filaments hairy proximally, inserted on floral cup;
anthers versatile, 2-locular, dehiscing by longitudinal slits;
ovary laterally compressed, short stalked;
style tapering to a narrow tube, stigma triangular, terminal.
legumes, sessile or short-stipitate, brown to red-brown or dark magenta, compressed laterally, lanceolate, narrowly winged on prominently veined abaxial suture, dull or glossy, indehiscent or dehiscent, if dehiscent, opening on one or both margins, glabrous or sparsely hairy.
dull brown, magenta, or red-brown, 48–109 × 7–21 mm, winged on abaxial suture, sometimes glossy, waxy, surfaces glabrous or hairy.
3–7, red-brown, laterally compressed, with circular hilum, funicular aril lobes absent, orbicular.
= 7.
Cercis canadensis
Cercis
Subspecies 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 10 (3 in the flora).
Cercis is found in mesic to arid habitats in North America and Eurasia. North American Cercis appears to have diverged from western Eurasian Cercis in the middle Miocene (P. A. Fritsch and B. C. Cruz 2012). Cercis spokanensis Knowlton is a fossil taxon from the Pacific Northwest.
In spite of the inclusion of Cercis in floras of New Mexico (I. Tidestrom and T. Kittell 1941; W. C. Martin and C. R. Hutchins 1980; K. W. Allred and R. D. Ivey 2012), no specimens of Cercis outside cultivation in that state could be located.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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 |
1. Leaf blades coriaceous, leaves thickened (0.15–0.3 mm thick), margins distinctly sinuate, surfaces dull to glossy adaxially, glabrous or hairy abaxially and adaxially; arid regions of Oklahoma, Texas. | C. canadensis |
1. Leaf blades thin, leaves (0.05–0.25 mm thick) to subcoriaceous, margins flat, surfaces usually dull (sometimes slightly reflective but not glossy), glabrous or hairy abaxially, glabrous adaxially; s Canada, c, e, w United States (including Oklahoma and Texas). | → 2 |
2. Leaf blade apex usually obtuse to acuminate, sometimes retuse; adaxial surface dull, abaxial surface glabrous or hairy, often much lighter in color; calyx 5–6.8 mm wide; s Canada, c, e United States. | C. canadensis |
2. Leaf blade apex emarginate to retuse, adaxial surface dull or slightly reflective, abaxial surface glabrous or hairy, both surfaces nearly concolor; calyx 6.4–10 mm wide; w United States. | → 3 |
3. Calyx 6.4–9.2 mm wide; banner 3.4–5.3 mm wide, wings 4.7–6.5 mm, keel. | → 5 |
5. 8–7.5 mm wide; California, Oregon. | C. occidentalis |
3. Calyx 8.4–10 mm wide; banner 4.9–6.3 mm wide, wings 7.2–9 mm, keel. | → 7 |
7. 2–8.9 mm wide; Intermountain region of Arizona, Nevada, Utah. | C. orbiculata |
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
CA
