570 PROCEEDINGS OP 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 cm. broad, plicate, 5-angled, violet or violet and white : 

 filaments short, one of them twice or thrice exceeding the others, 5 mm. 

 lone; 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 {Ediv. Palmer, no. 347) : 

 Mexico, Mount Zacoalco, July 10, 1865 or 1866 (Balm, no. 543) ; San 

 Juan del Rio, July 14, 1896 (G. G. Pringle, no. 7202) : Guanajuato, 

 in fields, 1895 {A. Dugh). 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. lentiim, 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, or 

 sparingly puberulent when young : peduncles solitary or in 2's, 1 to 2 cm. 

 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. — Guerreuo, low 

 sandy soil, Acapulco, Jan., 1895 (Edtv. Palmer, no. 533) : Oaxaca, 

 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, armed 

 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 : calyx 

 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, the 

 other larger, arcuate, 18 mm. long: fruiting calyx, including the persist- 

 ent lobes, 15 to 18 mm. long. — Oaxaca, near the town of Oaxaca, 

 Sept. 19, 1895 (L. C Smith, no. 814), Nov. 18, 1895 (Ed. Seler, no. 

 1394) : originally collected by Haenke, presumably between Acapulco 

 and the City of Mexico. 



S. (Nycterium) azureum. Stem fruticose, the young branches, 

 with peduncles pedicels and calyx, cinereous with dense but fine stellate 

 pubescence ; the branches sparingly beset with remote straight slender 



