628 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



7. Agoseris glauca (Pursh) Steud. Nom. Bot. ed. 2. 1: 37. 1840. 

 Troximon glaucum Nutt. Gen. PI. 2: 128. 1818. 



Type locality: "On the banks of the Missouri." 



Range: Washington and Saskatchewan to Utah and northwestern New Mexico. 

 New Mexico: Near Fort Defiance; Carrizo Mountains. Meadows in the mountains, 

 Transition Zone. 



8. Agoseris parviflora (Nutt.) D. Dietr. Syn. PI. 4: 1332. 1847. 

 Troximon parviflorum Nutt. Trans. Amer. Phil. Soc. n. ser. 7: 434. 1841. 

 Type locality: "On the plains of the Platte to the Rocky Mountains." 

 Range: Alberta and North Dakota to Colorado and New Mexico. 



New Mexico: Tunitcha Mountains; Sandia Mountains; Grosstedt Place. Mead- 

 ows, in the Transition Zone. 



12. TARAXACUM Hall. Dandelion. 



Perennial acaulescent herbs with pinnatifid, toothed, or rarely en the leaves and 

 large heads of yellow flowers terminating the naked hollow scapes; bracts of the 

 involucre mostly equal, with a number of shorter calyculate outer ones; receptacle 

 flat, naked; achenes oblong to fusiform, angled and nerved, spinulose at the summit, 

 beaked; pappus copious, of unequal persistent slender bristles. 



KEY TO THE SPECIES. 



Outer bracts reflexed from the base; leaves deeply pinnatifid. 



Terminal segments of the leaves broadly triangular; achenes 



greenish brown 1. T. taraxacum. 



Terminal segments of the leaves triangular or oblong; achenes 



red • 2. T. mexicanum. 



Outer bracts not reflexed from the base; leaves pinnatifid or den- 

 ticulate. 

 Outer bracts nearly as long as the inner, reflexed above the 



middle; leaves denticulate, yellowish green 3. T. dumetorum. 



Outer bracts less than half as long as the inner, usually ap- 



pressed; leaves pinnatifid, bright green 4. T. montanum. 



1. Taraxacum taraxacum (L.) Karst. Deutsch. Fl. 1138. 1880-83. 

 Leontodon taraxacum L. Sp. PI. 798. 1753. 



Taraxacum officinale Web. Prim. Fl. Hols. 56. 1780. 



Type locality: European. 



Range: Nearly throughout the United States, in some places introduced from 

 Europe, in others apparently native. 



New Mexico: Santa Fe; Las Vegas; Farmington; Chama; Raton. Open fields and 

 waste ground. 



2. Taraxacum mexicanum DC. Prodr. 7: 146. 1838. 

 Type locality: Near the City of Mexico. 

 Range: Colorado to Mexico. 



New Mexico: Chama; Nutritas Creek; Tierra Amarilla. Mountains, in the Tran- 

 sition Zone. 



3. Taraxacum dumetorum Greene, Pittonia 4: 230. 1901. 



Taraxacum oblanceolatum Rydb. Colo. Agr. Exp. Sta. Bull. 100: 410. 1906. 

 Type locality: Dale Creek, Wyoming. 

 Range: Alberta to Colorado and northern New Mexico. 



New Mexico: Upper Pecos River; top of Las Vegas Range. High mountains, in 

 the Arctic-Alpine Zone. 



