Galactia marginalis
Galactia brachypoda
edible milkpea
smooth creeping milkpea
procumbent, not twining, lignescent, sparsely to moderately short-strigose, hairs retrorse.
procumbent, creeping, not rooting at nodes, sometimes weakly twining distally, minutely strigose, hairs retrorsely or antrorsely appressed;
some or most internodes, especially proximally, longer than largest leaflet of adjacent node.
1, blade narrowly elliptic to narrowly lanceolate, 25–85 × 4–10(–16) mm, leathery, veins closely reticulate and strongly raised, thickened marginal vein completely encircling entire margin, apex rounded to obtuse, surfaces not glaucous abaxially, glabrous throughout.
3, blades elliptic to elliptic-lanceolate or broadly lanceolate to oblong-elliptic, sometimes linear-elliptic, (8–)15–45(–60) × (4–)10–25(–32) mm, ± leathery, veins slightly but distinctly raised on adaxial or both surfaces, apex obtuse to rounded or shallowly retuse, surfaces moderately to densely short-strigose with closely appressed hairs and lighter green but not glaucous abaxially, glabrous or sparsely short-strigose or minutely hirtellous and darker, slightly glossy or not adaxially.
flowers solitary, axillary;
axis 3–8 mm.
flowers usually (3–)5–15(–25), rarely 1 or 2, in pseudoracemes on distal 3/4 of shorter axes or usually on distal 1/5–1/4 of longer axes, often fasciculate distally;
axis (5–)20–80(–150) mm.
calyx 5–6 mm, short-strigose;
corolla pink to purple, purple-red, or deep lavender, 13–15 mm.
calyx 5–7 mm, sparsely strigose to glabrate, lobes greenish yellow to tan on inner surface when dry;
corolla not persisting after anthesis, lavender or violet to purplish, bright pink, or pinkish, lighter when dry, 11–15 mm.
straight, 25–35 × 5–7 mm, short-strigose, hairs closely appressed.
straight, (25–)30–60 × 4–5(–6) mm, densely strigose to strigose-sericeous, glabrescent.
(5–)7–9.
(3–)5–8(–12).
Galactia marginalis
Galactia brachypoda
Galactia marginalis is characterized by prostrate stems, glabrous, 1-foliolate leaves with closely reticulate, raised venation and a completely encircling marginal vein, and relatively large, solitary, axillary flowers. The species is known from at least 14 counties, mostly on the Coastal Plain of southeastern Texas.
A. Burkart (1971) described Galactia marginalis var. columbiana Burkart based on a specimen from Cundinamarca, Colombia, that was thought to represent an intermediary between the population of G. marginalis in southeastern Texas and in southern South America. The Colombia collection has subsequently been identified as G. glaucescens Kunth.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Galactia brachypoda is a coastal plain species that ranges from Maryland and Virginia to Alabama. The species is characterized by its essentially prostrate habit, mostly non-twining, short-strigose (antrorse or retrorse) stems (sometimes weakly twining distally), subcoriaceous leaflets with raised venation, and relatively large corollas. Plants of G. brachypoda with distally twining stems and relatively small leaves might be mistaken for G. regularis; the latter has climbing and consistently twining stems with looser and non-appressed vestiture, thinner leaves, and longer inflorescences with curved axes and smaller, less congested flowers.
W. H. Duncan (1979b) mapped three morpho-geographic entities of Galactia brachypoda, emphasizing stem vestiture; the widespread entity has appressed-retrorse hairs, while the other two have appressed-antrorse hairs. There appears to be no other difference that would consistently distinguish among these population systems and thus all are identified here as G. brachypoda. Analogous, alternate orientation of cauline vestiture occurs in G. joselyniae, G. microphylla, G. pinetorum, and G. smallii (G. L. Nesom 2015).
Many plants having antrorse hairs are encountered in Georgia, South Carolina, and southeastern North Carolina; these have narrower leaflets than elsewhere in the range.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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