WOOTOF AND STANDLEY FLOEA OF NEW MEXICO. 629 



2, Lygodesmia grandiflora (Nutt.) Torr. & Gray, Fl. N. Amer. 2: 485. 1842. 

 Erythremia grandiflora Nutt. Trans. Amer. Phil. Soc. n. eer. 7: 445. 1841. 

 Type locality: "In the Rocky Mountain range, on the borders of the Platte." 

 Range: Wyoming and Idaho to Arizona and northwestern New Mexico. 



New Mexico: Farmington (Standley 693G). Plains and low hills, in the Upper 

 Sonoran Zone. 



3, Lygodesmia texana (Torr. & Gray) Greene; Small, Fl. Southeast. U. S. 1315. 



1903. 



Lygodesmia aphylla texana Torr. & Gray, Fl. N. Amer. 2: 485. 1842. 



Type locality: Texas. 



Range: Plains of New Mexico and Texas. 



New Mexico : Near Fort Cummings; Hondo Hill; 40 miles west of Roswell. Upper 

 Sonoran Zone. 



Prenanthella exigua (A. Gray) Rydb. probably occurs in New Mexico. It was 

 described from plants collected on hills above El Paso. We have seen no New Mexi- 

 can specimens, although the range of the plant extends well to the north. 



16. CREPIS L. 



Perennial herbs with mostly basal, toothed, pinnatifid, or nearly entire leaves and 

 rather small corymbose yellow heads; involucre cyUndric or campanulate, swollen at 

 the base, of few narrow bracts with several short basal ones; achenes columnar, ribbed 

 or nerved; pappus of copious soft whitish capillary bristles. 



KEY to the species. 



Leaves canescent. 



Involucres glabrous 1. C. acuminata. 



Involucres canescent 2. C. occidentalis . 



Leaves glabrous. 



Involucres glabrous. 



Leaves nearly linear, toothed, erect, green 3. C. mogollonica. 



Leaves oblanceolate, entire, flattened upon the ground, 



glaucous 4. C. chamaephylla. 



Involucres glandular or hirsute. 



Leaves long-petioled, the petioles half as long as the 



blades or more 5. C. petiolaia. 



Leaves sessile or on short, broadly winged petioles. 



Leaves thick, lobed with deep obtuse lobes; invo- 

 lucres about 9 mm. high G. C. neomezicana. 



Leaves thin, shallowly dentate with acute teeth; 



involucres about 10 mm. high 7. C. perplexans. 



1. Crepis acuminata Nutt. Trans. Amer. Phil. Soc. n. ser. 7: 437. 1841. 

 Type locality: "Plains of the Platte." 



Range: Washington and Montana to California and New Mexico. 

 New Mexico: A single specimen seen, without definite locality but probably from 

 western McKinley County. Mountains, in the Transition Zone. 



2. Crepis occidentalis Nutt. Joum. Acad. Phila. 7: 29. 1834. 

 Type locality: "Columbia River." 



Range: Wasliington and Montana to California and northern New Mexico. 

 New Mexico: Pass southeast of Tierra Amarilla {Eggleston 6596). Open hills, in 

 the Upper Sonoran and Transition zones. 



3. Crepis mogollonica Greene, Contr. U. S. Nat. Herb. 16: 176. 1913. 



Type locality: West Fork of the Gila, Mogollon Mountains, Socorro County, New 

 Mexico. Type collected by Metcalfe (no. 576). 

 Range: Kn-wn only from type locality, in the Transition Zone. 



