558 PROCEEDINGS OF THE AMERICAN ACADEMY. 
corymb generally bifid or,trifid, many-flowered, cymose, the fruiting 
pedicels mostly ascending. — Prodr. 47; Dunal, Sol. 203, t. 23, & in 
DC. Prodr. xiii. 260. — Originally described from the West Indies, 
where it iscommon. In Mexico known only from the South. CHIAPAS, 
_ near Huehuetan, alt. 150 to 615 m., Feb. 22, 1896 (Z. W. Nelson, no. 
3830). 
Var. RuBIGINOsuM, Dunal, I.c. 261, described from Guatemala, ap- 
parently differs from the species only in its more ferrugineous pubescence. 
GuatemALa, Rio Dulce, Depart. Livingston, March, 1889 (/. Donnell 
Smith, no, 1840): Nicaragua (C. Wright). 
. HerNanpesu, Moc. & Sessé. More spiny throughout, the branches 
more loosely sordid-tomentose: leaves deeply and sinuately 5-7-lobed, 
the lobes sometimes pinnatifid : inflorescence at first subcorymbose, simple 
or bifid, becoming distinctly racemose: fruiting pedicels spreading. — 
Moc. & Sessé in Dunal, l.c. 266.— Cutapas, mountains near Tonala, 
alt. 600 to 1,050 m., Aug. 14, 1895, table land about Ocuilapa, alt. 1,050 
to 1,170 m., Aug. 21, 1895 (EH. W. Nelson, nos. 2904, 3029): GUATE- 
MALA, San Miguel Uspantdin, Depart. Quiché, alt. 1,850 m., April, 
1892 (Heyde & Lux in exsice. J.D. Smith, no. 3446): Nicaragua (C 
Wright). 
S. madrense. Shrubby, the young branches loosely stellate-tomentose 
with canescent or ochraceous hairs, and armed with straight or slightly 
curved prickles: leaves thick, ovate to ovate-lanceolate, acuminate, U2 
equally subcordate at base, subentire or bluntly and shallowly sinuate- 
angulate, without the petiole (1 to 8 cm.) 5 to 15 em. long, 4 to 13 cm. 
wide, above olive-green, stellate-scabrous, beneath a little paler and 
tomentulose, sometimes slightly armed; young leaves often aureate- 
tinged, and velutinous: inflorescences extra-axillary, in maturity 4 to 9 
em. long, simple or bifid, scorpoid-racemose ; the pedicels glandular 
hairy, spreading and reflexed in fruit: calyx-lobes lanceolate, long- 
acuminate: corolla 2 cm. long, 3 em. broad, whitish, deeply lobed, the 
lobes lanceolate or lance-ovate, acutish: filaments very short ; anthers 
subequal, slender, 8 or 10 mm. long: the style somewhat longer: ben? 
apparently black, glabrous, 1 to 1.5 em. in diameter. — S. diversifoliums 
Wats. Proc. Am. Acad. xxi. 434, not Schl. .S, torvum, Wats. |. c. xX. 
441, not Swartz. —'The common representative of the group in the 
Sierra Madre and westward to the Pacific. Sonora, Sierra oe Jos 
Alamos, March 25 to Apr. 8, 1890 (Edw. Palmer, nos. 363, 364): Cr 
HvAHUA, Hacienda San Miguel, 1885 (Hdw. Palmer, no. 22): Terie, 
San Blas, June 6, 1897 (E. W. Nelson, no. 4335): SuvaLoa, Mazatlan, 
