Senna cumingii var. eremobia (Phil.) 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
Holotypus seen at SGO by Johnston (Contrib. Gray Herb. n. ser. 85: 48. 1929).
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Synonyms
Cassia eremobia Phil.
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Description
Variety Description - Pubescence and fls of var. cumingii, but the lfts all relatively short and broad, as described in key, the secondary venulation of the upper face commonly prominulous.—Collections: 4. [Key: "Fls relatively small, the longest petal 9-16 mm; filaments of 2 long abaxial stamens 4.5-8.5 mm; style 2-5 mm; pod (at fertile segments) ±6-9 mm wide; ovules 10-16. Lfts of major lvs either of broader outline or shorter, or both.3. Major lfts at once short and broad, ±12-16 x 3.5-5.5 mm; style ±2 mm; local between 25° and 25°30'S in Antofagasta."]
Distribution and Ecology - Rock outcrops on the coastal plain and stony beds of quebradas in the foothills of the Coastal Cordillera between ±25° and 25°30'S in s. Antofagasta, Chile.— Fl. X-XII.
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Discussion
The var. eremobia owes its individuality of facies solely to its condensed and diminished foliage, for the flowers and pods are identical to those of var. cumingii, which reaches its northern known limit in the same latitudes, at the mouth of Taltal river. The modification of leaves appears a slight and easy step, for occasional axillary branchlets of otherwise typical var. cumingii (cf. Bridges 1295, BM) bear leaves of the same compressed type and leaflets of some upper vigorous leaves of the widely distributed Werdermann 844 are plainly transitional in outline.
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Distribution
Antofagasta Chile South America|