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

174 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [VOL. 35
For the present S. rizzinii appears somewhat precariously distinct in its less
angulate stems, larger floral bracts, longer style and fewer (±44-58, not 76-108)
ovules, characters that need confirmation from more numerous specimens than
are now avaUable.
The eariiest known example ofS. chrysocarpa is in Aublet's herbarium (BM!)
preserved under an unpubhshed name (''Cassia aulica" = M O Neg. 2274).
Another, without locahty "donne par M. Dupuis," has lain for more than 200
years unidenrified in the Lamarckian herbarium (P).
37. Senna rizzinii Irwin & Barneby, nom. nov. Cassia granulata Rizzini, Leandra
4-5: 16. 1974.—". . . ad Paulo Afonso, Bahia, in Caaringa ... A. P.
Duarte XII-73."—Holotypus not seen, but the protologue conclu­
sive.—Non C. granulata (Urban) Macbride, 1919.
Cassia chrysocarpa var. (?) psilocarpa Bentham in Martius, Fl. Bras. 15(2): 101. 1870.—". ..
in collibus arenosis prope Aracaty provinciae Ceara: Gardner n. 1568."—Holotypus, collected
VII. 1838 (fl, fr), K! = IPA Neg. 907.
Shrubs 1.5-4 m, pUosulous almost throughout with fine short incumbent and
scattered longer, loosely ascending hairs up to 0.35-0.7 mm, the hornotinous
branchlets terete or bluntly angled, the small foliage bicolored, the hts sublus­
trously olivaceous above, paler duU beneath, usually pubescent on both faces
and the hairs on upper face pustulate-dilated at base, sometimes glabrescent
ventrally, the inflorescence thyrsoid-paniculate, the lower racemes often leafy-
bracteate but the distal naked and weU exserted.
Stipules very slenderly pliantly setiform (2-)3-7 mm, at base 0.25-0.45 mm
wide, tardUy deciduous with or after the If.
Lvs 3-7 cm; petiole including discolored but scarcely swollen pulvinus
(7-)l 1-26 mm, at middle 0.4-0.8 mm diam, obscurely shaUow-sulcate; rachis 4-9
mm; gland 1 between proximal pair, stipitate, slenderly claviform acute
1.1-2.6 X 0.3-0.6 mm, pUosulous at least at base; distal pair of lfts asymmetri­
cally elliptic, lance-, or ovate-elliptic obtuse or subacute mucronulate
(18-)20-45 X (7-)9-15 mm, ±2-3 rimes longer than wide, at base cordate on
proximal and cuneate on distal side, the margin revolute, the slender straight or
genriy incurved midrib with 5-9 pairs of camptodrome secondary veins aU prom­
inulous on both faces but very finely so above, more sharply so beneath, the
tertiary venulation faint and irregular or immersed.
Peduncles with raceme-axis 2-8 cm, the peduncle 0.7-1.8 cm, the raceme rather
densely 7-20-fld; bracts firm, yellowish or brownish, eUipric or obovate-elliptic
acute 4-7(-10) x 2-4(-8) mm, at base embracing the pedicel, deciduous at full
anthesis or subpersistent; pedicels 10-18 mm; buds globose, thinly pUosulous or
glabrate; sepals yeUowish, the outer ellipric-obovate 5-6 mm, the inner subpetaloid
broadly oblong-obovate or suborbicular 7-9 mm; petals yellow, pilosulous
dorsaUy, scarcely heteromorphic, oblong-obovate beyond the slender claw, the
longest (10.5-)14-19 mm; filaments thinly puberulent, of 4 shorter fertUe stamens
1.2-2 mm, of 3 long abaxial ones 2.5-5.5 mm; thecae glabrous or thinly pUosulous
in dorsoventral grooves, of 4 shorter median stamens 5-5.5 mm, with divaricate
beak 0.45-0.6 mm, of 3 longer ones 5-6 mm, with porrect beak 0.6-1.2 mm;
ovary densely shaggy-pUosulous, the less densely pubescent style 4-5 mm, gently
incurved and 0.45-0.75 mm diam at apex, the stigmaric aperture 0.3-0.4 mm
diam; ovules 44-58.
Pod stiffly ascending or geotropic, long-persistent in papery tatters after dis­
charge of seed, the stipe 2-6 mm, the body plumply sausage-shaped terete