Crocanthemum rosmarinifolium
rosemary frostweed
ascending to erect, (13–)20–40(–51) cm, stellate-tomentose.
cauline and, sometimes, basal basal mat-forming;
petiole 1–3 mm;
blade obovate, 10–22 × 3–5 mm;
cauline: petiole 1–4 mm;
blade oblanceolate to narrowly lanceolate, 10–38(–48) × 2–5.5(–7.8) mm, margins revolute;
surfaces stellate-tomentose abaxially, stellate-pubescent adaxially, without simple hairs;
lateral veins obscure abaxially.
axillary and terminal, solitary flowers or glomerules; chasmogamous flowers solitary, at tips of branches, overtopping cleistogamous, cleistogamous 2–7 per glomerule, flowering 1–3 months later than chasmogamous.
10–22 mm;
bracts 3–7 × 0.5–1 mm.
flowers: outer sepals linear, 1.2–2.5 × 0.2 mm, inner sepals 2.5–4.3 × 1.3–2 mm, apex acute;
petals obovate, 4–6 × 3.5–5 mm;
capsules 2–3 × 1.4–1.8 mm, glabrous.
flowers: outer sepals linear, 0.5–1 × 0.2 mm, inner sepals ovate, 1.5–1.8 × 1–1.5 mm, apex acute;
capsules 1.3–1.7 × 1–1.3 mm, glabrous.
Crocanthemum rosmarinifolium
Crocanthemum rosmarinifolium is easily distinguished from sympatric species by its slender leaves, relatively small petaliferous flowers, occasional basal leaves, and overall pale color. As noted by R. M. Harper over a century ago, it seems not to occupy natural habitats and is found primarily on roadsides. Populations in the Dominican Republic occur up to at least 2200 m.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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