Cassiinae pt 1 NY-Botanical_gardens_Vol. 35_1 - Copy.pdf - Antbase

1982] CASSIINAE—SENNA 151
Amply leafy subarborescent shrubs and small trees, at anthesis 3-15 m, with
terete striate brown, commonly glabrous or subglabrous, less often (var.) pilo­
sulous stems and branchlets, the lower face of the thinly chartaceous lfts with
axes of inflorescence strigulose-pUosulous, usually with forwardly impressed or
incumbent, less often with erect hairs up to 0.1-0.5 mm, the fohage bicolored,
the If-blades lustrous green above, paler subglaucescent beneath, the inflores­
cence usually a greatly contracted leafless panicle of racemes (sometimes simplified
to a single raceme) arising from 1 or more serial supra-axiUary buds as­
sociated either with mature living lvs or on old wood, then sometimes clustered
on a knotty burl, the whole very much shorter than the lvs, rarely some flowering
axes developed and bearing If and fl simultaneously.
Stipules (caducous, little known) falcately oblanceolate or linear-oblanceolate
acute, 4.5-10 x 0.8-3 mm, prominently venulose.
Lvs (2-)2.5-4 dm; petiole including discolored but little swollen pulvinus 2.5-6
cm, at middle (1.5-) 1.7-2.9 mm diam, obtusely ribbed both laterally and ventrally
so as to appear ventrally 3-sulcate; rachis 2.5-6(-7) cm, a little longer or shorter
than the petiole; gland 1 sessUe or almost so between the proximal pair, lanceolate
or ovate in outhne, 2.5-4 mm tall; seta glandular-thickened, appearing as a second
gland behind the distal pair of pulvinules, these 6-11 (-13) mm; distal pair of lfts
obhquely obovate-short-acuminate 15-28 x 6-12.5 cm, ±2-2.7 times as long as
wide, at base very asymmetrically cuneate on both sides, sometimes (especially
on proximal side) broadly so or subcordate, the margins narrowly revolute, the
forwardly incurved midrib with (9-) 10-14 major (with few random intercalary)
secondary veins above immersed or barely prominulous, beneath sharply carin­
iform, the tertiary venules and fine reticulation subequally prominulous on both
faces or subimmersed above, the ultimate defined areoles