Monographs Details: Cassia microphylla Willd.
Authors:Howard S. Irwin, Rupert C. Barneby
Authority: Irwin, Howard S. & Barneby, Rupert C. 1978. Monographic studies in Cassia (Leguminosae, Caesalpinioideae). III. Sections Absus and Grimaldia. Mem. New York Bot. Gard. 30: 1-300.
Family:Caesalpiniaceae
Description:Species Description - Small slender undershrubs with erect, wiry distally paniculately branching stems of several years duration to perhaps 6 dm, arising probably from a xylopodium (not seen), the old leafless stems dark gray and smooth, the younger ones like the lf-stalks densely minutely viscid-villosulous and glandular-verruculose throughout, toward the short terminal immersed inflorescence becoming minutely yellow-setulose, the very small forwardly imbricated lfts densely resin-dotted on both faces, glutinous, concolorous. Stipules erect, subulate, 0.6-1.5 mm, persistent or very tardily deciduous. Lvs very likely heteromorphic but only the upper ones known, these crowded along the terminal branchlets, spreading-ascending, 2.5-6 cm, short-petiolate; pulvinus scarcely dilated or differentiated, to 1 mm; petiole 3-7 mm, at middle 0.3-0.5 mm diam, narrowly winged, the sulcus almost closed; rachis 1.5-4.5 cm; lfts (5-)6-13(-15) pairs, slightly accrescent upward, moderately crowded, tilted forward, point up to meridian, turned half face to face on scarcely dilated pulvinule 0.2-0.4 mm, in outline broadly obovate or elliptic obtuse, minutely mucronulate, 3-10.5 x 1.5-5 mm, at base rounded to subcordate on both sides, the margin entire, plane, minutely villous-ciliolate but not setulose, the blades stiffly chartaceous on both sides, olivaceous, glutinously sublustrous, densely resin-dotted, the midrib with 2-4 pairs of secondary and some tertiary connecting venules above immersed, variably prominulous beneath but the midrib there always carinate. Inflorescence (known only in advanced fruit) a sessile depauperate condensed subcorymbose 2-5-fld raceme to 5 mm; bracts lance-subulate, 1-2 mm persistent; pedicels in fruit widely ascending, 10-17 mm, bracteolate 1-2.5 mm below calyx, the minute bracteoles tardily deciduous; fls (acc. Glaziou yellow) not seen. — Collection: 1.

Distribution and Ecology - Stony campo, probably near 1000 m, known only from the type-locality, this not precisely identified but situated on or near the west boundary of Distrito Federal with State of Goias in the drainage of Rio Corumba near lat. 16° S. — Fl. probably ±V-VI. "Goyaz, Guariroba au Morro Cubatao (Glaziou n. 20960)."

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Distribution:Brazil South America| Goiás Brazil South America| Distrito Federal Brazil South America|

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