Monographs Details: Mimosa dolens subsp. dolens var. pangloea
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.
Description:Variety Description - Wandlike subshrubs 1.5-2.5 dm, at once armed and hispid on ribbed stems with random broad- based aculei 1.5-4 mm mixed with smaller setaculei, and viscid almost throughout with capitate-glandular setulae ±0.1-0.3 mm, the lfts either glabrous or viscid-setulose on both faces, slenderly continuously setose-marginate; leafstalks 2-4.5 cm; pinna-rachises 4-6.5 mm, the interfoliolar segments 4-6 mm; lfts 10-14-jug., oblong-elliptic, to 13-18 x 5-6 mm, the marginal nerve ±0.1 mm diam., the venation prominulous on both faces; peduncles 2-3 cm; capitula without filaments 8.5-10 mm diam., extremely dense; bracts ±3 x 0.9 mm, stipitate-glandular dorsally; corolla ±4 mm, the lobes either glandular-setulose or glabrous.
Distribution and Ecology - In dry campo near Araucaria forest, ±870-900 m, known only from between 25° and 26°S in s.-e. Paraná, in mun. Ponta Grossa and S. Mateus do Sul.—Fl. I—III.
This remarkable member of the M. dolens aggregate, first collected by Per Dusén in March 1914 (4054, MO), resembles var. dolens in armature and viscid setulae, but the latter here can extend over both faces of the leaflets and up through the inflorescence. It differs more importantly in suppression of the calyx, which in var. dolens is either symmetrically or asymmetrically pappiform. In lack of calyx var. pangloea resembles the almost sympatric subsp. acerba var. uncta. This, however, has unarmed stems, resinous from sessile glands but not capitate-glandular, and leaflets simply setose dorsally, glabrous above, nowhere glandular.
Distribution:Brazil South America
| Paraná Brazil South America