195 



Collected by Mr. C. G. Pringle, at Tomellin Station, State of Oaxaca, altitude 615 

 meters, July 11,1897 (No. 7478); and by Mr. E. W. Nelson between Petlatcingo and 

 Acatlau, State of Puebla, November 20, 1894 (No. 1996). 



This species is near C. wislheni Gray, but abundantly distinct. (Only 1 or 5 

 specimens taken while the train stopped for dinner.) 



Cassia unijuga Rose, sp. nov. 



Small shrub, 3 to 6 dm. high; leaves without glands; young branches densely 

 villous; stipules filiform, 4 to 6 mm. long; petiole very short or wanting; leallets 

 1 pair, rarely 2 pairs, nearly orbicular, rounded or Bomewhat cuncate at base, 

 rounded and apiculate at the summit, about 12 mm. in diameter, more or less villous, 

 but becoming glabrous; dowers large, in few-ilowered axillary racemes; sepals 

 huge and obtuse; corolla 2.5 cm. or more in diameter; perfect stamens 7, abortive 3; 

 legume Hat, 1 to 1.3 dm. long, 6 nun. wide, acuminate, stipitate. 



Collected by Mr. C. G. Pringle in the eastern part of the State of Puebla, near 

 Tehuacan, August 5, 1897 (No. 6773). 



This species comes nearest our United States species, C. wializeni, differing espe- 

 cially in its leaiiets. It has no close affinities with any of the other described Mexi- 

 can species except ('. pringhi above. 



Pithecolobium acatlense Benth. Trans. Linn. Soc. 30:593. 1875. 



This species is very common in tho tropical valleys of western Mexico. It is a 

 shrub growing to the height of 3 to 5 meters, the corolla is covered with lonj; silky 

 hairs and the stamens are long-exserted as in Calliandra. The pod, which has never 

 been described, is 15 cm. long and 2 cm. wide, much ilattened, tapering at base into 

 a stipe and apiculate at tip, densely covered with short reddish hairs. 



Collected by J. N. Rose in southern Durango between the two ranges of tho Sierra 

 Madre, August II, 1897 (No. 2270) ; near San Juan Capistrano, Zacatecas, August 19 

 (No. 2434) ; near Huejuquilla, Jalisco, August 25 (No. 3564), and at liolanos, Septem- 

 ber 10 to 19 (No. 3692). 



DESCRIPTIONS OF MISCELLANEOUS NEW OR RARE SPECIES. 



Ayenia fruticosa Rose, sp. nov. 



Low shrub; young branches densely stellale-pubesceiit; sepals small, 2 to 3 mm. 

 long, ovate, acuminate; petioles short, 2 to 4 mm. long; blade ovate, acute or 

 obtuse, 8 to 15 mm. long, stellate-pubescent on both sides, paler beneath; llowers 

 solitary and axillary; pedicels slender, long (much longer than the subtending leaf) 

 20 to 30 mm. long, bracteate some distance below the middle; sepals ovate, shortly 

 acuminate, 2.5 nun. long; stamens 5; anthers 3-cclled; ovary sessile; fruit densely 

 covered with long (Tor the genus) prickles. 



Collected by Mr. C. G. Pringle near Tehuacan, State of Puebla, altitude 1,5C0 

 meters, 1897 (No. 6743). 



Celastrus pringlei Rose, sp. nov. 



A vine climbing to 6 meters, the branches reddish, thickly dotted with small 

 whitish lenticels; leaves alternate, narrowly elliptical, rounded or wedge-shaped at 

 base, acute, 7.5 to 10 cm. long, 1.8 to 2.5 cm. broad at the middle, with shallow, 

 obtuse teeth, usually apiculate, dark green, glabrous; racemes 1 to 3 in an axil, 2.5 

 to 5 cm. long; pedicels 4 to 6 mm. long, 2 or 3 braeted, jointed just below the flower; 

 sepals 5; petals 5, white; stamens 5, filaments attached below the disk; anthers 

 broadly ovate, apiculate; disk prominent, lobed; ovary 3-eelled; cells each with 

 one erect ovule; dehiscence of capsule loculicidal; seeds covered with a yellow 

 aril. 



Collected by Mr. C. G. Pringle in canyons of mountain side above Cuernavaca, 

 altitude 2,300 meters, June 1, 1898 (No. 6842). 



