WOOTON AND STANDLEY FLORA OF NEW MEXICO. 273 



KEY TO THE SPECIES. 



Pods emarginate, the sinus narrow 1. T. color adense. 



Pods truncate or nearly so, the sinus broad and open. 



Cauline leaves ovate, 18 to 25 mm. long; pedicels slender, 8 



to 10 mm. long; pods 5 mm. wide 2. T. fendleri. 



Cauline leaves oblong, 15 mm. long or less; pedicels stout, 6 



mm. long or shorter; pods not more than 2.5 mm. wide. 



Stems 20 to 30 cm. high, slender; cauline leaves broader 



than the basal ones; sepals green o. T. glaiii 



Stems 10 cm. high or less, stouter; cauline leaves not 



broader than the basal ones; sepals purplish 4. T. purpura 



1. Thlaspi coloradense Rydb. Pull. Torrey Club 28: 2S0. 1901. . u. 

 Type locality: Paid Mountain near Pikes Peak, Colorado. / JJ<XsJ/'lU 

 Range: Colorado and New Mexico. 



New Mexico: Chama; Las Vegas Hot Springs; Sierra Grande. Mountains, in the 

 Transition Zone. 



2. Thlaspi fendleri A. Gray, PI. Wright. 2: 14. 1853. 



Type locality: Organ Mountains, New Mexico. Type collected by Wrighl (no. 

 1322). 



Range: New Mexico. 



New Mexico: Cooney; Hillsboro Peak ; Organ Mountains. Canyons in the moun- 

 tains, in the Transition Zone. 



Perhaps, judging from the specific name and from the citation of synonymy, Fend- 

 ler's 44 should be taken as the type of this species. Doctor Gray's description, how- 

 ever, evidently applies to the very different plant of southern .New Mexico, and 

 Wright's specimens are the only ones cited. If Fendler's plant were taken as the 

 type, the specimens here listed should have a new name. 



3. Thlaspi glaucum A. Nels. Bull. Torrey Club 25: 275. 1898. 



TJdaspi alpestre glaucum A. Nels. Wyorn. Agr. Exp. Sta. Bull. 28: 84. 1896. 

 Type locality: La Plata Mines, Wyoming. 

 Range: Idaho to central New Mexico. 



New Mexico: Winsors Ranch; San Mateo Mountains; Kelly; Cloudcroft; Chama; 

 Pecos Baldy. Meadows under pine trees, in the Transition and Canadian zones. 



4. Thlaspi puxpurascens Rydb. Bull. Torrey Club 28: 281. 1901. 



Type locality: Arizona. C&c> 



Range: Colorado to Arizona and Ne\? Mexico. 



New Mexico: Hermits Peak; Stinking Lake. Mountains, in the. Transition Zone. 



15. BURSA Weber. Shepherd's pi rsi . 



Branched annual with a rosette of narrow pinnatind leaves; flowers amaU, white; 

 silique obcordate-trianj ular, flattened contrary to the partition. 



1. Bursa bursa-pastoris (I.. I Web Prim. I'l. II<>1.-. 11. 1780. 



Thlaspi buraa-pastoris L. Sp. PI. 647. L753. 



Captella bursa-pastoris Medic. Pflanzengat. 1: 85. L792. 



Type lo< ujty: "Habital in Europae cultis ruden 



Ni'.u Mexico: Winsors Ranch; Kingston; Las Huertas Canyon; Gallinas Canyon; 

 Pecos: Mesilla Valley; Gilmares Ranch; Chama. 



A very common weed in the Eastern States, introduced from Europe. ' 

 rather rare in Nero Mexico, but occurs occasionally in irrigated fields and in 

 Doubtless it will become more common. The pi am may be recognized by the trian- 

 gular-cuneate edlicle winch gh the popular as well as 1 1 1 • - Latin name 



52576* L5 -18 



