Difference between revisions of "Croton glandulosus"

Linnaeus

Syst. Nat. ed. 10, 2: 1275. 1759.

Common names: Sand or tooth-leaved or tropic croton vente conmigo
Synonyms: Decarinium glandulosum (Linnaeus) Rafinesque Geiseleria glandulosa (Linnaeus) Klotzsch Oxydectes glandulosa (Linnaeus) Kuntze
Treatment appears in FNA Volume 12. Treatment on page 215. Mentioned on page 207, 216.
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Revision as of 19:56, 16 December 2019

Herbs, annual, 1–12 dm, monoecious. Stems much branched distally, usually coarsely stellate-hairy, rarely glabrescent. Leaves not clustered; stipules linear-subulate, glandular or not, to 0.5 mm or absent; petiole 0.2–1 cm, glands at apex 2, yellow, sessile to shortly stipitate, cuplike; blade ovate proximally, oblong-lanceolate distally, 0.6–3.5(–7) × 0.3–1.5(–3) cm, base obtuse to truncate, margins coarsely crenate to serrate-dentate, apex obtuse to rounded, both surfaces green, stellate-hairy, glabrate, or rarely glabrous. Inflorescences bisexual, racemes, 1–3 cm, staminate flowers 10–20, pistillate flowers 1–4. Pedicels: staminate 0.8–2 mm, pistillate 0–5 mm. Staminate flowers: sepals 5, 0.8–1.2 mm, abaxial surface stellate-hairy; petals 5, oblanceolate, 1–1.3 mm, abaxial surface glabrous except margins ciliate; stamens 7–13. Pistillate flowers: sepals 5, subequal, 6–7.5 mm, margins entire, apex straight to slightly incurved, abaxial surface glabrous except stellate-hairy apically; petals 0 or 5, rudimentary; ovary 3-locular; styles 3, 1–2.5 mm, deeply 2-fid, terminal segments 6. Capsules 3.5–6 × 4–5 mm, smooth; columella 3-angled. Seeds 3–4 × 2–2.5 mm, shiny. 2n = 16.

Distribution

V12 821-distribution-map.jpg

United States, Mexico, West Indies, Central America, South America.

Discussion

Varieties ca. 20 (5 in the flora).

Croton glandulosus is widespread in the New World, with a complex pattern of variation. The classification here follows B. W. van Ee et al. (2009).

Selected References

None.

Key

1 Leaf blades glabrate or sparsely to moderately stellate-hairy. > 2
2 Plants 2–12 dm; leaf blades 2–7 cm. Croton glandulosus var. septentrionalis
2 Plants 1–2 dm; leaf blades 0.6–2(–3) cm. > 3
3 Leaf blades glabrate, bases markedly 3-veined; petiole apical glands sessile; Florida. Croton glandulosus var. floridanus
3 Leaf blades sparsely stellate-hairy, bases obscurely 3-veined; petiole apical glands stipitate; Kansas, New Mexico, Oklahoma, Texas. Croton glandulosus var. lindheimeri
1 Leaf blades moderately to densely stellate-hairy. > 4
4 Leaf blades firm-thick, length mostly 2 times width or less, marginal teeth rounded; petiole apical glands sessile. Croton glandulosus var. arenicola
4 Leaf blades membranous, length mostly more than 2 times width, marginal teeth pointed; petiole apical glands sessile or stipitate. > 5
5 Leaf blades 1–2(–3) × 0.3–0.8(–1.3) cm; petiole apical glands stipitate, circular when dry, 0.1–0.4 mm diam. Croton glandulosus var. lindheimeri
5 Leaf blades 2–7 × 0.7–3 cm; petiole apical glands sessile, wavy-wrinkled when dry, 0.5–0.8 mm diam. > 6
6 Stems densely stellate-hairy, hairs spreading, radii unequal; leaf blades densely stellate-villous. Croton glandulosus var. pubentissimus
6 Stems moderately stellate-hairy, hairs appressed, radii equal; leaf blades moderately stellate-hairy. Croton glandulosus var. septentrionalis
... more about "Croton glandulosus"
Benjamin W. van Ee +  and Paul E. Berry +
Linnaeus +
Sand or tooth-leaved or tropic croton +  and vente conmigo +
United States +, Mexico +, West Indies +, Central America +  and South America. +
Syst. Nat. ed. +
Decarinium glandulosum +, Geiseleria glandulosa +  and Oxydectes glandulosa +
Croton glandulosus +
species +