Ludwigia glandulosa subsp. glandulosa
Ludwigia glandulosa subsp. brachycarpac.
cylindricfruit primrose-willow
usually reddish green, (20–)40–80(–100) cm.
rarely reddish green, 10–55(–90) cm.
petiole 0.1–1.5 cm, blade elliptic to very narrowly elliptic, those on main axis 3.2–12 × 0.4–2.1 cm, those on branches 1–4.5 × 0.3–1 cm.
petiole 0–1 cm, blades linear-elliptic to linear, sometimes very narrowly elliptic, those on main axis 3–5(–7) × 0.3–0.5(–1) cm, those on branches 0.8–3.6 × 0.2–0.3(–0.8) cm.
bracteoles attached at base of ovary or to 2 mm distal to base, rarely on pedicel, 0.5–1 × 0.2–0.4 mm.
brac-teoles attached at base of ovary, 0.4–0.8 × 0.1–0.2 mm.
sepals 1.3–2.3 × 1.2–1.7 mm, apex acuminate;
nectary disc glabrous;
style 0.3–0.5 mm, stigma 0.3–0.5 mm diam.
sepals 1.1–1.9 × 1–1.8 mm, apex acute or short-acuminate;
nectary disc obscurely, minutely papillose;
style 0.4–0.8 mm, stigma 0.2–0.3 mm diam.
subterete, (4–)5–8(–9) × 1.6–2(–3) mm, pedicel 0–0.4(–0.5) mm.
obscurely 4-angled, 2–5 × 1.3–2 mm, pedicel 0–0.2 mm.
0.5–0.7 × 0.3–0.4 mm, surface cells elongate parallel to seed length.
0.6–0.8 × 0.3–0.4 mm, surface cells elongate transversely to seed length.
Ludwigia glandulosa subsp. glandulosa
Ludwigia glandulosa subsp. brachycarpac.
The distribution of subsp. glandulosa is relatively continuous along the Atlantic and Gulf coastal plains, extending inland to Tennessee, extreme western Kentucky, extreme southern Indiana, Illinois, and Missouri, to southeastern Oklahoma and eastern Texas, with disjunct populations in Maryland and in north-central Missouri. In Florida, it occurs only in the panhandle region.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies brachycarpa grows along the Gulf Coast from southwestern Louisiana to Nueces County, Texas, and more sporadically northward in eastern Texas to south-central Oklahoma.
Subspecies brachycarpa was published initially by Peng as a new combination based on Ludwigia cylindrica var. brachycarpa Torrey & A. Gray, not realizing that the variety was based on Jussiaea brachycarpa Lamarck, which Peng considered to be a synonym of L. glandulosa subsp. glandulosa. Therefore, subsp. brachycarpa is a new subspecies but was invalid when published by Peng since it was not accompanied by a Latin description in 1986; that situation has since been remedied.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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