Galactia wrightii
Galactia microphylla
Wright's milkpea
littleleaf milkpea
procumbent proximally, weakly twining distally, strongly lignescent, densely to sparsely strigose, hairs retrorsely appressed to slightly spreading.
procumbent, not twining, herbaceous to lignescent, hirsute-villous, hairs irregularly to strongly deflexed, rarely nearly appressed-retrorse.
3, blades oblong-elliptic to elliptic-ovate, 15–48 × 5–18 mm, herbaceous, veins not raised, apex rounded to obtuse or shallowly retuse, surfaces moderately to densely strigose-sericeous and glaucous abaxially, sparsely to densely short-strigose-sericeous with closely appressed hairs to pubescent with soft, spreading-erect hairs, sometimes strigose to glabrous, adaxially.
3, blades elliptic, 10–30 × 5–16 mm, herbaceous, veins not raised, apex rounded to obtuse, surfaces glossy, glaucous, and sparsely short-strigose abaxially with appressed to ascending hairs, strigose to glabrescent or glabrate adaxially.
flowers (2–)5–18(–30) in pseudoracemes, usually in fascicles, axis rarely 10 mm and 2- or 3-flowered;
axis (10–)35–200(–250) mm.
flowers solitary and axillary or 2–6 in reduced pseudoracemes;
axis 10–20 mm.
calyx 5–7 mm, loosely short-strigose to hirsute-pubescent, lobes greenish yellow to tan on inner surface when dry;
corolla not persisting after anthesis, pink to purple-rose to lavender, lighter when dry, 11–12 mm.
calyx 3–4 mm, closely strigulose, lobes greenish yellow to tan on inner surface when dry;
corolla not persisting after anthesis, light purple, lighter when dry, 6–7 mm.
straight, 25–50 × 4–5 mm, moderately to densely strigose to strigose-sericeous.
straight, 25–45 × 4–5 mm, short-hirsute, hairs spreading.
(3–)5–9.
3–8.
Galactia wrightii
Galactia microphylla
Galactia wrightii is characterized by twining stems, mostly oblong-elliptic leaflets with glaucous abaxial surfaces, relatively long inflorescences with numerous flowers and relatively large corollas, and strigose-sericeous fruits. The type of var. mollissima is a plant with vestiture more spreading than normal; such variants are scattered through the range in Arizona, as cited by Kearney and Peebles, as well as in Texas.
Plants in southwestern New Mexico and southeastern Arizona (especially the Huachuca Mountains but not the Chiricahua Mountains) tend to have reduced vestiture; the leaves are sometimes completely glabrous. Such plants extend southward in Mexico along the Chihuahua-Sonora border region. Intermediates are numerous, especially in Arizona, and no distinct boundary seems evident. In Texas, G. wrightii is known from four counties of the trans-Pecos and Big Bend regions.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Galactia microphylla is characterized by its prostrate habit, hirsute-villous stems, and relatively small leaves; it is known from the western Florida panhandle and adjacent Alabama. Compared to G. floridana, G. microphylla has shorter internodes, smaller and thinner leaves light green on both surfaces and glaucous beneath, shorter inflorescences with fewer flowers, and minutely and closely strigillose calyces.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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