Croton subcoriaceus Jabl.

• Authority

  Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.

• Family

  Euphorbiaceae

• Scientific Name

  Croton subcoriaceus Jabl.

• Type

  Type. Mouth of Cano Yapacana, Upper Orinoco, alt. 125 m, Amazonas, Venezuela, 18 Jun 1959, J. J. Wurdack & L. S. Adderley 43028 (holotype, y. fr. N Y ).

• Description

  
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  Latin Diagnosis - Arbor 7 metralis ramifieatione subdichasiali. Ramuli teretes, juveniles lepidoti. Stipulis rigidis, 5-5-1/2 mm longis, subulatis, cito deciduis, juvenilibus tantum visis. Petiolis 2-3 cm longis. Laminis subcoriaceis supra atro-viridibus, subtus pallidioribus, ambitu ellipticis vel leviter obovatis utrinque rotundatis vel subrotundatis, rariter subcuneatis, margine integerrimis, basi glandulas geminas patelliformes gerentibus, penninerviis, costis lateralibus 17-18 jugis, lepidibus 0.2-0.3 mm diametientibus, fimbriatis 32-45 radiatis sparse tectis. Inflorescentiis spiciformibus 12-18 cm longis, apice ramulorum subumbellatim vel pleiochasiter confertis. Spicis unisexualibus omnino masculis vel bisexualibus, apice flores 23-25 masculos, parte inferiore glomerules bisexuales geminos vel ternos gerentibus. Rhachis profunde sulcata. Bracteis squamiformibus, triangularibus 1.2-1.5 mm longis. Flores (fide collectorum), albi, [male] pedicellati [female] sessiles. Floribus [male] apertis cum staminibus 7-10 mm diametientibus, sepalis ovatis vel obovatis 3-1/2 mm longis, 2-1/2 mm latis, extus dense lepidotis, petiolis membranaceis, fimbriatis, 3-1/2 mm longis, 1-12 mm latis, staminibus 16. Floribus 5 apertis 9 mm diametientibus, sepalis 5, rariter 6, extus lepidotis intus glabris. Petala minuta. Ovariis 2-1/2 mm altis, 5-1/2 diametientibus, dense lepidotis, stylis 3 liberis in columnam hand aggregatis, bis bifidis eodem tempore 12 crures stigmatales formantibus.

• Discussion

  No doubt this new species is closely related to C. cuneatus from which it differs by larger fiowers and rounded not cuneate leaf base. Spikes 5, subumbellately clustered in a tight pleiochasium.