SI 6 . CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



1. Sibbaldia prociimbens L. Sp. PI. 284. 1753. 

 Type locality: "Habitat in alpibus Lapponiae, Helvetiae, Scotliiae." 

 Kange : Arctic and alpine regions of North. America, Asia, and Europe. 

 New Mexico: Santa Fe and Las Vegas mountains. Meadows, in the Arctic- Al- 

 pine Zone.. 



10. DASIPHORA Raf. Shrubby cinquepoil. 



Low branching shrub with pinnately 3 to 7-foliolate silky leaves and scarious 

 stipules; young branches silky- villous, the older stems brown, with shredded bark; 

 flowers bright yellow, axillary and solitary or in small cymes; hypanthium saucer- 

 shaped; bractlets, sepals, and petals 5; petals nearly orbicular; stamens about 25; 

 achenes densely \illous. 



1. Dasiphora fruticosa (L.) Rydb. Mem. Bot. Columb. Coll. 2: 188. 1898. 



Potentilla Jruticosa L. Sp. PI. 495. 1753. 



Type locality: "Habitat in Eboraco, Anglia, Oelandia australi, Sibiria." 



Range: Biitish America to California, New Mexico, and New Jersey; also in Eu- 

 rope and Asia. 



New Mexico: Chama; Catskill; Santa Fe and Las Vegas mountains; Mogollon Moun- 

 tains. Damp meadows and along streams. Transition to Arctic-Alpine Zone. 



A densely branched shrub, often becoming a meter high or more. Above timber 

 line it is very much stunted and gnarled. When covered Avith its numerous golden 

 yellow flowers it is a handsome plant. 



11. DRYMOCALLIS Fourn. 



Rather coarse herbaceous perennials with scaly rootstocks, pinnate leaves, and 

 cymose inflorescence; hypanthium saucer-shaped; bractlets, sepals, and petals 5; 

 petals but little exceeding the sepals, whitish or yellow; stamens 20 to 30; pistils very 

 numerous. 



KEY TO the species. 



Petals white or cream-colored ; plants slender, low, 30 cm. high or less. . 1. D. convallaria. 

 Petals bright yellow; plants stout, tall, frequently GO cm. high 2. D. glandulosa. 



1. Drymocallis convaUaria Rydb. Mem. Bot. Columb. Coll. 2: 193. 1898. 

 Potentilla conmllaria Rydb. Bull. Torrey Club 24: 249. 1897. 



Type locality: Near Bozeman, Montana. 

 Range: Montana to New Mexico. 



New Mexico : Santa Fe and Las Vegas mountains ; Sierra Grande. Damp woods, in 

 the Transition and Canadian zones. 



2. DrymocaUis glandulosa (Lindl.) Rydb. Mem. Bot. Columb. Coll. 2: 198. 1898. 

 Potentilla glandulosa Lindl. in Edwards's Bot. Reg. 19: pi. 1583. 1833. 



Type locality: "California." 



Range: British Columbia to South Dakota, California, and New Mexico. 

 New Mexico: Ensenada; Johnsons Mesa; Gallinas Canyon; Chama. Wet ground, 

 in the Transition Zone. 



12. SIEVERSIA R. Br. 



Low, more or less cespitose, herbaceous perennials with a cluster of twice pinnate 

 leaves and a few scapelike stems 50 cm. high or less; flowers in cymose clusters; 

 hypanthium turbinate, 5-bracted; sepals 5, ovate-lanceolate, acute; petals 5, yellow 

 or purphsh; styles not jointed, plumose or appressed-pubescent, sometimes elongating 

 in fruit; achenes pubescent. 



KEY TO the species. 



Petals purplish; styles in fruit much elongated, plumose 1. S. grisea. 



Petals yellow; styles slightly if at all elongated in fruit, appressed- 

 pubescent 2. S. turhinata. 



