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Acanthocereus floridanus Small ex britton & Rose 1923

Publication The Cactaceae 4: 276 (1923).
Type : Small s.n., U.S.A., Floride, Key Largo, décembre 1917 et 1918, conservé dans les herbiers du New York Botanical Garden (NY : holotype) et des jardins botaniques royaux de Kew (K : isotype).

Synonyme de

Acanthocereus tetragonus (Linné) Hummelinck 1938

Commentaires

Description originale:
"On page 125, vol. II, insert the following:
3a. Acanthocereus floridanus Small, sp. nov.
Stems and branches diffusely spreading or reclining, 3 to 10 meters long, stout: joints prominently 3 to 5-angled, but mostly 3-angled, dark green, often forming impenetrable thickets: areolesremote, with mostly 4 to 7 slender or subulate spines, the central one often 1 to 2 cm. long: ovary stout-trumpet-shaped, 8 to 10 cm. long, with few large, separated tubercled areoles at the base,bearing mostly 3 to 5 diverging spines, those on the upper part usually with one spine each; outer perianth-segments deltoid to triangular-lanceolate or lanceolate-subulate and almost linear, the longer ones 3.5 to 4 cm. long, acuminate; inner perianth-segments broadly linear, 3.5 to 4.5 cm. long, about six times as long as wide, broadly acuminate; filaments adnate more than halfway up from the base of the hypanthium; anthers less than 2.5 mm. long.
Hammocks, along or near the coast, southern peninsular Florida, adjacent islands,and Florida Keys. Type collected by J. K. Small, on Key Largo, December 1917 and 1918; preserved in the herbarium of the New York Botanical Garden.
This Florida plant has been referred by us to A. pentagonus, but specimens recently collected by Dr. Small, including good flowers, which we had not seen before, indicate it to be a distinct species, characterized by its much shorter perianth and more spiny ovary.
Illustrations: Britton and Rose, Cactaceae 2: 123. f. 182; 124. f. 184, as Acanthocereus pentagonus."