Euphorbia pergamena


Bull. Torrey Bot. Club 25: 615. 1898.

Common names: Southern Florida sandmat rocklands spurge
Conservation concern
Synonyms: Chamaesyce adenoptera subsp. pergamena (Small) D. G. Burch C. pergamena (Small) Small Euphorbia adenoptera subsp. pergamena (Small) Oudejans
Treatment appears in FNA Volume 12. Treatment on page 282. Mentioned on page 252, 253.

Herbs, perennial, with moderately to strongly thickened rootstock. Stems prostrate to ascending, occasionally mat-forming, terete to slightly flattened, 5–18 cm, glabrous on lower surface, strigillose to sericeous on upper surface. Leaves opposite; stipules distinct, subulate, better developed on lower side of stem, 0.4–1.3 mm, glabrous or pilose; petiole 0.3–0.5 mm, puberulent, sericeous, or strigillose; blade oblong to ovate, 4–7 × 2–4 mm, base asymmetric, hemicordate, larger side sometimes amplexicaulous, margins entire or serrulate, apex obtuse, surfaces puberulent, sericeous, or strigillose; 3-veined from base, lateral veins inconspicuous. Cyathia solitary at distal nodes or at nodes of short, congested, axillary shoots; peduncle to 0.5 mm. Involucre campanulate, 1–1.3 × 1–1.1 mm, canescent; glands 4, pinkish, oblong or reniform, 0.2 × 0.4–0.6 mm; appendages white to pink, lunate, unequal, those of proximal glands oblique, 0.6–1 × 1.4–1.6 mm, those of distal glands symmetric, 0.3 × 0.8–0.9 mm, irregularly undulate to incised. Staminate flowers 15. Pistillate flowers: ovary puberulent, sericeous or strigillose; styles 0.5–1 mm, 2-fid at apex. Capsules oblate, well exserted from involucre at maturity, 1–1.3 × 1.3–1.8 mm, puberulent, sericeous or strigillose; columella 1 mm. Seeds whitish to gray, ovoid, 4-angled in cross section, 0.7–0.8 × 0.5–0.6 mm, with 3–4 transverse sulci alternating with low transverse ridges.

Phenology: Flowering and fruiting year-round.
Habitat: Crevices of limestone outcrops in pinelands and pine-palm woods.
Elevation: 0–10 m.


V12 175-distribution-map.jpg

Fla., West Indies (Cuba, Hispaniola).


Euphorbia pergamena is a Florida-listed threatened species known within the flora area from only Miami-Dade and Monroe counties in extreme southern Florida. The species is often included as a subspecies of E. adenoptera (for example, D. G. Burch 1965), but here A. Herndon (1993b) is followed and it is treated as a distinct species.

Selected References


Lower Taxa

... more about "Euphorbia pergamena"
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
Anisophyllum +
Southern Florida sandmat +  and rocklands spurge +
Fla. +, West Indies (Cuba +  and Hispaniola). +
0–10 m. +
Crevices of limestone outcrops in pinelands and pine-palm woods. +
Flowering and fruiting year-round. +
Bull. Torrey Bot. Club +
Conservation concern +
Chamaesyce adenoptera subsp. pergamena +, C. pergamena +  and Euphorbia adenoptera subsp. pergamena +
Euphorbia pergamena +
Euphorbia sect. Anisophyllum +
species +