346 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined : 



Durango: Sierra Madre, west of Durango, altitude 2,300 meters, September- 

 October, 1881, A. Forrer; Sierra Madre, 15 miles north of Guanacevi, 2,100 to 

 2,300 meters, August 17, 1898, E. W. Nelson, 4761. 



Chihuahua: Base of the Sierra Madre, pine barrens, September 17, 20, 1887, 

 C. G. Pringle, 1382; in the Sierra Madre near Colonia Garcia, July 20, 1899* 

 C. II. T. Townsend & C. M. Barber, 155. 



Locality unknown: Cultivated from Pringle's bulbs at the Botanical Garden, 

 Harvard University, August, 1888. (Origin not otherwise stated.) 



2. CALOCHORTUS GHIESBREGHTII S. Wats. 



CalorhortusghiesbreghtiiS.W&ta. Proc. Amer. Acad. 14: 268. 1879. "Chiapas Ghies- 

 breght (Nob. 104, 661)." ' 



Stem branching up to 40 cm. high; conn unknown; lower leaves narrowly linear, 

 the upper linear-lanceolate graduating into lanceolate bracts; flowers one to several! 

 erect on slender peduncles exceeding the leaves: sepals (of dried specimens) lilac | 

 shading to lemon yellow on the margins, oblong, obtuse or slightly acute at apex[ 

 about 1.5 cm. long; petals tinged with lilac at base, cuneate-obovate, obtuse, hairy 

 and with a distinct hairy gland below the middle, anthers 0.3 cm. long, shorter than 

 the slender filaments, "capsule 1£ to 2 inches long." (S. Wats. loc. cit.; fruit lost 

 from the specimens quoted by him.) 



Distribution: Chiapas. The southernmost species. 

 Specimens examined: 



Chiapas: Without more specific locality, Ghiesbreght 661. "Terre froide. Fleurs 

 jaunes pales. Fleuris in Aout et Septembre. Croit sur les rochers;" also 

 Ghiesbreght 104. Both in the Gray Herbarium, marked "n. sp." 



3. CALOCHORTUS EXILIS Painter, sp. nov. 



Stem simple or with a few branches, 8 to 15 cm. high from a fibrous-coated corm 

 about 1 cm. in diameter; leaves narrowly linear, mainly basal; bracts lanceolate- 

 flowers 1 or 2, erect, on slender peduncles shorter than the leaves; sepals purple to 

 purplish or even yellowish, 1 cm. long, oblong, obtuse or sometimes mucronulate; 

 petals lemon yellow, obovate, ouncate, obtuse; anthers 1.5 mm. long, shorter than 

 the filaments; ovary ovate-lanceolate in outline; capsule unknown. 



Type in the U. S. National Herbarium, no. 354467, collected on bare summits of the 

 Sierra de Pachuca, altitude 3,000 meters, September 14, 1899, by C. G. Pringle (no.. 

 8247). 



Distribution: In the mountains of nidalgo. 

 Specimens examined: 



Hidalgo: Cerro de los Navajos, Mineral del Monte, November, 1835, C. Mrenberg 

 501; bare summits, Sierra de Pachuca, type collection. 



4. CALOCHORTUS PRINGLEI Robinson. 



Calochortus pringlei Robinson, Proc. Amer. Acad. 36:472. 1901. "Collected by 

 C. G. Pringle in thin soil on the top of the knobs of the Sierra de Tepoxtlan State of 

 Morelos, Mexico, altitude 2,300 meters, 15 September, 1900, no 8435 Tvne in 

 herb. Gray." l 



Stem simple or branched, somewhat flexuous, 30 to 50 cm. high from an ovoid 

 fibrous-coated corm, surmounted by a mass of long, linear, dark brown scales- leaves 

 linear, the basal 20 to 40 cm. long, cauline gradually smaller; bracts lanceolate 

 acuminate; flowers dark purple or almost black, erect, on slender pedicels exceeding 

 the leaves; sepals "narrowly obovate, bluntly pointed or retuse, glabrous except at 

 a small roundish area below the middle on the inner surface; " petals narrowly obovate 



