Monographs Details: Mimosa xanthocentra subsp. tremula var. tremula
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. 1991. Sensitivae Censitae. A description of the genus Mimosa Linnaeus (Mimosaceae) in the New World. Mem. New York Bot. Gard. 65: 1-835.
Synonyms:Mimosa tremula Benth., Mimosa goyazensis Benth.
Description:Variety Description - Resembling the coarser, larger-lvd variants of var. subsericea except for hispid indumentum of fulvous-stramineous setae to (1.5-)2-5.5(-6) mm, the lfts at least thinly pilose on upper face; leafstalks of lower (deciduous) lvs 4-12 mm, of upper lvs not over 4 mm, many reduced to pulvinus; rachis of longer pinnae 4.5-8.5(-9) cm, their lfts (23-)25-37-jug., spaced at intervals to 1.5-3 mm; pods ±3 mm wide, the replum hispid with setae to 2.5-5 mm, the valves glabrous to puberulent or sometimes thinly setulose.
Distribution and Ecology - In campo sujo, campo rupestre, and open cerrado, 870-1200 or on Chapada dos Veadeiros to 1550 m, scattered over centr. and s.-e. Goiás and Distrito Federal from ± 11°30'S at the type-locality (Natividade) s. along the Tocantins-S. Francisco divide to ± 18°S (near Catalão), w. to Sa. dos Pirineus and disjunctly e. to Sa. do Espinhaço near 17°S in n.-centr. Minas Gerais (Montes Claros).—Fl. XII-II, fr. I-?, the repla long persistent. Map 63.
The types of M. goyazensis and M. tremula are in my eyes narrowly conspecific, but the names as applied by Bentham in Flora brasiliensis (1876) stand for distinct taxa: M. goyazensis being the equivalent of the present var. tremula, and M. tremula of the present var. tenuis. In combining the two names, I would have preferred to adopt the epithet goyazensis and synonymize M. tremula, which Bentham misunderstood. When united at the varietal level, however, a ghostly var. tremula, autonymously generated by var. tenuis Bentham in 1841, takes precedence over any usage of goyazensis that might be proposed at the varietal level.
Distribution:Brazil South America
| Goiás Brazil South America
| Distrito Federal Brazil South America
| Minas Gerais Brazil South America