WOOTON AND STANDLEY FLOKA OF NEW MEXICO. 501 



6. ANTHOPOGON Necker. Fringed gentian. 



Annual or biennial herbs with opposite entire sessile leaves and large, terminal, 

 mostly 4-parted flowers; calyx relatively large, the lobes unequal, the inner broader 

 than the outer, scarious or hyaline-margined; corolla blue, showy, the tube campanu- 

 la te-funnelform, the lobes large, rounded, fimbriate or lacerate, the sinuses not plaited; 

 stamens usually accompanied by a row of glands at the base of the filaments; capsule 

 stipitate, the seeds numerous. 



KEY TO THE SPECIES. 



Annual; flowers long-pedunculate 1. A. elegans. 



Perennial; flowers short-pedunculate, nearly sessile 2. A. barbellatus. 



1. Anthopogon elegans (A. Nels.) Rydb. Bull. Torrey Club 33: 148. 1906. 

 Gentiana elegans A. Nels. Bull. Torrey Club 25: 276. 1898. 



Type locality: Cummins, Wyoming. 

 Range: British America to Arizona and New Mexico. 



New Mexico: Rio Pueblo; Taos Mountains; Santa Fe and Las Vegas mountains. 

 Meadows in the mountains, from the Transition to the Arctic-Alpine Zone. 



2. Anthopogon barbellatus (Engelm.) Rydb. Bull. Torrey Club 33: 148. 1906. 

 Gentiana harhellata Engelm. Trans. Acad. St. Louis 2: 26. 1863. 



Type locality: "On the alpine summit of Mount Flora, in the Snowy Range, Colo- 

 rado." 



Range: Colorado and northern New Mexico. 



New Mexico: Baldy; Costilla Pass; Brazos Canyon. Meadow s in the mountains, 

 Canadian to Arctic-Alpine Zone. 



7. AMARELLA Gilib. Gentian. 



Annuals, biennials, or perennials with opposite, entire, mainly sessile leaves and 

 rather small flowers, solitary or in cymes; flowers 4 or 5-merous; calyx usually small, 

 with imbricated equal or unequal lobes; corolla funnelform or salverform, the lobes 

 entire or sparingly toothed, not plicate in the sinuses, often filamentous at the base; 

 ovary 1-celled; capsule usually sessile, the seeds numerous. 



KEY TO THE SPECIES. 



Calyx lobes very unequal, two of them large, foliaceous, ovate or 



oval, much broader than the rest and covering them 1. A. heterosepala. 



Calyx lobes slightly unequal, all alike in general form, lanceolate 

 or linear. 

 Flowers yellowish, numerous, crowded, short-pediceled; 



leaves usually equaling or exceeding the internodes. . . 2. A. strictiflora. 

 Flowers bluish, few, distinctly pediceled; middle internodes 



elongated, usually longer than the leaves 3. A. scopulorum. 



1. Amarella heterosepala (Engelm.) Greene, Leaflets 1: 53. 1904. 



Gentiana heterosepala Engelm. Trans. Acad. St. Louis 2: 215. 1863. 



Gentiana distegia Greene, Pittonia 4: 182. 1900. 



Amarella distegia Greene, Leaflets 1: 53. 1904. 



Type locality: "Northern slope of the Uintah Mountains, east of the Great Salt 

 Lake, Utah." 



Range: Utah and Colorado to New Mexico. 



New Mexico: Tunitcha Mountains; Sandia Mountains; Hillsboro Peak; Cox Can- 

 yon; Cloudcroft. Mountains, in the Transition Zone. 



This species has broader leaves and is more slender than our others, while the 

 peduncles are much longer. 



