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

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

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1982] CASSIINAE—SENNA 85<br />

18. Pod either piano-compressed or (less often) turgid, but if turgid the<br />

seeds areolate; seeds mostly lying broadside to the valves (in s.<br />

Andean 99. S. arnottiana, p. 316, broadside to interseminal se<strong>pt</strong>a,<br />

but then not over 14 in number); ovules nearly always less than 28.<br />

19. Seeds areolate; Andean and Pacific S. America; montane and<br />

desert Mexico and Central America.<br />

xvi. ser. Pachycarpae (p. 293).<br />

19. Seeds exareolate; Andes from Ecuador to Chile and n.-w. Argentina;<br />

Atlantic s. Brazil. xvii. ser. Stipulaceae (p. 324).<br />

18. Pod cylindric or strongly turgid, the seeds lying broadside to the<br />

interseminal se<strong>pt</strong>a, exareolate, and relatively numerous, the ovules<br />

28-152 (in rare Peruvian S. lasseigniana only 22-26).<br />

xviii. ser. Coluteoideae (p. 345).<br />

5. Gland inserted on petiole at variable distance below the proximal pair of lfts,<br />

often contiguous to the If-pulvinus (lfts commonly several pairs, if only 1 pair<br />

cf. rare Peruvian 51. S. acuparata, p. 202).<br />

20. Anthers of 2 long antepetalous abaxial stamens prolonged beyond the orifice<br />

into a thickened hnguiform appendage; style usually both recurved and<br />

distally dilated, or the stigmatic orifice elongate and introrse; tropical and<br />

warm-temperate, from s. and s.-w. United States to Argentina, where sympatric<br />

with the next represented by an adventive monocarpic weed.<br />

xix. ser. Basiglandulosae (p. 405).<br />

20. Anthers of 2 long antesepalous abaxial stamens truncate or obscurely 2labiolate<br />

at apex; style not dilated, only slightly incurved, its orifice poriform;<br />

range cool-temperate, in centr. and e. United States and s.-e. Canada,<br />

and duration perennial. xx. ser. Temperatae (p. 443).<br />

Petiolar gland 0.<br />

21. Mesophytic shrubs and trees of wide tropical dispersal in West Indies and<br />

South America (1 exotic cultivated in Central America); sutures of pod not<br />

winged and its valves continuous.<br />

22. Hypanthium of fl infundibuliform, attenutate downward to joint with pedicel;<br />

sepals thin-textured, early reflexed; staminodes hnear; seeds narrowly<br />

oblong-oblanceolate in outline; native and widespread.<br />

i. ser. Sapindifoliae (p. 85).<br />

22. Hypanthium of fl shallowly broadly obconic; sepals carnosulous (wrinkled<br />

when dry) not reflexed at anthesis; staminodes hippocrepiform; seeds subdiscoid;<br />

cult. only. ii. ser. Floridae (p. 97).<br />

21. Xerophytic shrubs and treelets of centr. and w. Mexico; sutures of pod winged<br />

and its valves separating when ripe into individual panels over each seed.<br />

xxi. ser. Galeottianae (p. 448).<br />

Bi. ser. SAPINDIFOLIAE Irwin & Barneby<br />

Senna sect. Chamaefistula ser. SapindifoHae Irwin & Barneby, ser. nov. inter<br />

affines Americanas petiolo eglanduloso, fohis plurifoholatis, hypanthio<br />

infundibuliformi, a ser. Floridis sens, restr. (gerontogeis, una per<br />

Americam cahdiorem culta) sepahs membranaceis mox reflexis necnon<br />

seminibus oblongis (nee discoideis) diversae.—Sp. typica: Cassia sap-<br />

indifolia Vogel = Senna silvestris var. sapindifoUa (Vogel) Irwin & Bar­<br />

neby.<br />

Cassia sect. Chamaesenna ser. Floridae *** Paniculatae Americanae Bentham, Proc. Linn. Soc.<br />

London 27: 549. 1871.<br />

Cowellocassia Britton ex Britton & Rose, N. Amer. Fl. 23(4): 251. 1930, pro gen.—Generitypus:<br />

C. scleroxyla Britton = Senna domingensis (Sprengel) Irwin & Barneby.<br />

Corolla zygomorphic but the early reflexed sepals strongly graduated, the hy­<br />

panthium infundibuliform, narrowed downward to a joint with pedicel (this most<br />

evident in sterUe fls); androecium functionally 7-merous, the 3 adaxial members<br />

Hnear staminodal, the fertUe anthers moderately firm-textured, those of 4 median

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