Senna pendula var. stahlii (Urb.) H.S.Irwin & Barneby
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Authors
Howard S. Irwin, Rupert C. Barneby
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Authority
Irwin, Howard S. & Barneby, Rupert C. 1982. The American Cassiinae. A synoptical revision of Leguminosae tribe Cassieae subtrib Cassiinae in the New World. Mem. New York Bot. Gard. 35, part 1: 1-454.
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Family
Caesalpiniaceae
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Scientific Name
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Type
Syntypi omnes †B; lectoneotypus, Sintenis 2138, collected 21.X. 1885 (fl), GH! paratypi, Sintenis 3074, M, MO, NY!—Adipera stahlii (Urban) Britton & Rose ex Britton & Wilson, Sci. Surv. Porto Rico & Virgin Is. 5(3): 370. 1924.
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Synonyms
Cassia stahlii Urb., Adipera stahlii (Urb.) Britton & Rose ex Britton & P.Wilson
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Description
Variety Description - In stature, foliage, vesture and pod closely resembling var. ovalifolia, but the petiolar glands more numerous, 2, 3 or 4, between all or all but the distal pair of lfts; pedicels proportionately elongate, 25-33 mm; fls small, the innermost sepal ±7 mm, the longest petal 11.5-14 mm; 2 long filaments ±6 mm, their anther 4.5 x 1 mm; style 1.8-2.2 mm, hooked at apex; ovules ±74.—Collections: 9. [Key: "Lfts obovate or oblanceolate, rarely elliptic-oblanceolate, broadest above (exceptionally near) the middle; range of the whole sp. Style at and after anthesis 1.5-5 mm and the 2 long abaxial filaments 6-11 mm. Plants of Mexico, West Indies, Central America and of South America n. and w. of the Orinoco-Amazon forests. Long anthers, including obscure beak, ±4.5 mm; Puerto Rico."]
Distribution and Ecology - Open hillsides and thickets along streams, up to 600 m, local in hill country on and near the north-south divide in e.-centr. Puerto Rico (about Aibonito and Sa. de Cayey).—Fl. VIII-XII.
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Discussion
At the fruiting stage this geographically isolated variety of S. pendula can hardly be distinguished from var. ovalifolia except by the more numerous petiolar glands, situated between all or all but the distal pair of leaflets, and by the elongate pedicels (25+, not 11-23 mm). It differs from this, however, as from all other forms of its species, in the very short abaxial stamens coinciding with an abbreviated style hooked at tip. The only senna native to Puerto Rico that closely resembles var. stahlii in general habit, foliage and terete pod is S. bicapsularis, distinguishable at all seasons by the short pedicels, even in fruit not over 5 mm long. Cassia stahlii commemorates Augustin Stahl (1842-1917), physician and naturalist of German-Dutch descent, botanically active in Puerto Rico in 1883-1889.
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Distribution
Aibonito Puerto Rico South America| Cayey Puerto Rico South America|