Difference between revisions of "Euphorbia trichotoma"

Kunth in A. von Humboldt et al.

Nov. Gen. Sp. 2(fol.): 48; 2(qto.): 60. 1817.

Common names: Sand-dune spurge
Conservation concern
Synonyms: Galarhoeus trichotomus (Kunth) Small Tithymalus trichotomus (Kunth) Klotzsch & Garcke
Treatment appears in FNA Volume 12. Treatment on page 311. Mentioned on page 295, 312.
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|special status=Conservation concern
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V12/V12_893.xml
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|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V12/V12_893.xml
 
|genus=Euphorbia
 
|genus=Euphorbia
 
|subgenus=Euphorbia subg. Esula
 
|subgenus=Euphorbia subg. Esula

Revision as of 21:12, 27 May 2020

Herbs, perennial, with thick rootstock. Stems erect, branched, 15–40 cm, glabrous. Leaves: petiole absent; blade obovate to oblanceolate, 5–20 × 2–7 mm, base broadly attenuate, margins entire, apex acute to obtuse, surfaces glabrous; venation pinnate, very obscure, midvein prominent. Cyathial arrangement: terminal pleiochasial branches 3, each usually 1–2 times 3-branched, sometimes unbranched; pleiochasial bracts similar in shape and size to distal leaves, alternate; dichasial bracts distinct, obovate to oblanceolate, base broadly attenuate, margins entire, apex acute to obtuse; axillary cymose branches 0. Cyathia: peduncle 0.7–1 mm. Involucre hemispheric, 1–1.5 × 1.4–2 mm, glabrous; glands 5, elliptic to slightly crescent-shaped, 0.4–0.6 × 0.9–1.1 mm; horns divergent, 0.1–0.2 mm. Staminate flowers 8–10. Pistillate flowers: ovary glabrous; styles 0.2–0.4 mm, 2-fid. Capsules depressed-ovoid, 1.1–1.5 × 2–3 mm, strongly 3-lobed; cocci rounded, minutely papillate, sometimes appearing smooth, glabrous; columella 1.6–1.9 mm. Seeds white, ovoid-globose, 1.8–2 × 1.6–1.8 mm, smooth; caruncle ± rounded and flattened, 0.3 × 0.3 mm.


Phenology: Flowering and fruiting year-round (primarily spring–summer).
Habitat: Coastal beaches, sand dunes, thickets.
Elevation: 0–10 m.

Distribution

V12 893-distribution-map.jpg

Fla., Mexico, West Indies, Central America.

Discussion

Euphorbia trichotoma is found in coastal peninsular Florida from Hillsborough County south to Key West.

Selected References

None.

Lower Taxa

None.
... more about "Euphorbia trichotoma"
Ricarda Riina +, Dmitry V. Geltman +, Jess A. Peirson +  and Paul E. Berry +
Kunth in A. von Humboldt et al. +
Sand-dune spurge +
Fla. +, Mexico +, West Indies +  and Central America. +
0–10 m. +
Coastal beaches, sand dunes, thickets. +
Flowering and fruiting year-round (primarily spring–summer). +
Nov. Gen. Sp. +
Conservation concern +
Galarhoeus trichotomus +  and Tithymalus trichotomus +
Euphorbia trichotoma +
Euphorbia subg. Esula +
species +