570 PROCEEDINGS OF THE AMERICAN ACADEMY. 
peduncles slender, in anthesis erect, 0.5 to 1 dm. long, soon strongly de- 
jected: calyx white-stellate, with 10 long linear-subulate divisions: 
corolla 3 to 4 em. broad, plicate, 5-angled, violet or violet and white: 
filaments short, one of them twice or thrice exceeding the others, 5 mm. 
long; anthers broad-lanceolate, blunt, 5 mm. long: style 10 to 12 mm. 
long, glabrous: fruit said to be yellow. — DurANGo, rare in crevices of 
rocks, Iron Mt., &c., near Durango, July, 1896 (Hdw. Palmer, no. 347): 
Mexico, Mount Zacoaleo, July 10, 1865 or 1866 (Hahn, no. 543); San 
Juan del Rio, July 14, 1896 (C. G. Pringle, no. 7202): GUANAJUATO; 
in fields, 1895 (A. Dug?s). Related, apparently, to S. somniculentum, 
Kunze, but differing in its closer whitish pubescence, longer petioles, 
longer more slender peduncles, and generally blunter leaves. 
S. (Polymeris) nocturnum. A woody climber with the habit of 
S. lentum, Cav.: branches glabrous, or minutely stellate-puberulent at 
tips: leaves solitary or geminate, ovate, 2.5 to 5 cm. long, 2 to 3 cm 
wide, with acute or obtuse tips, rounded or acutish below to slender 
petioles 1 cm. or less in length, subentire, glabrous on both faces, OF 
sparingly puberulent when young: peduncles solitary or in 2’s, 1 to 2 em 
long, bearing solitary nocturnal blue flowers: calyx, in anthesis sparingly 
puberulent, later quite glabrate, a shallow cup with 10 lance-subulate 
teeth; corolla minutely and sparingly puberulent without, 12 mm. high: 
berry apparently red, glabrous, 1 cm. in diameter. — GUERRERO, low 
sandy soil, Acapulco, Jan., 1895 (Edw. Palmer, no. 533): OAxAG* 
river-bed above Tehuantepec, Jan. 10, 1896 (Ed. Seler, no. 1625). 
S. (Cryptocarpum) macroscolum. Plant with the habit of 
S. rostratum, Dunal: stem puberulent, slightly glandular above, arm 
with rather scattered yellowish straight stout spines 1 to 1.75 cm. long: 
leaves very deeply pinnatifid, the segments again cut into rounded lobes; 
sparingly pilose above or glabrate, armed with long stout spines: caly® 
hirsute, becoming glabrate, armed with several long (1.5 cm.) slender 
spines and many shorter finer ones, deeply cut into lanceolate lobes : 
corolla as in S. rostratum: 4 stamens subequal, 8 or 10 mm. long, as 
other larger, arcuate, 18 mm. long: fruiting calyx, including the persist 
ent lobes, 15 to 18 mm. long. — Oaxaca, near the town of Oaxact, 
Sept. 19, 1895 (ZL. OC. Smith, no. 814), Nov. 18, 1895 (Ed. Seler, 2° 
1394): originally collected by Haenke, presumably between Acapulco 
and the City of Mexico. 
S. (Nycterium) azureum. Stem fruticose, the young branche 
with peduncles pedicels and calyx, cinereous with dense but fine stellate 
e; the branches sparingly beset with remote straight slender 
