Rydberg: Studies on the Rocky Mountain flora 315 



margined; petals about 5 mm. long; capsule about 6 mm. long, 

 slightly curved near the upper end. 



This is Cerastium arvense fiiegianum HoUick & Britton, but not 

 that of Hooker. It differs from C. strict um L., its nearest relative, 

 in the low, depressed stem, yellowish herbage, thicker and smaller 

 leaves, the lower of which are often obtuse, and the smaller more 

 condensed flowers. It grows on geyser formations in the Yellow- 

 stone National Park, at an altitude of about 2,000 m. 



Wyoming: Lower Geyser Basin, Aug. 4, 1897, Rydberg & 

 Bessey 4025 (type, in herb. N. Y. Bot. Garden); Aug. 11, 1872, 

 J. M. Coulter. 



Alsine Palmeri sp. nov. 



A cespitose perennial; stems several, spreading, 5 cm. high or 

 less, glabrous; leaves ovate or ovate-lanceolate, 2-5 mm. long, 

 fleshy, acute; cyme 3-7-flowered ; bracts lanceolate, green; sepals 

 lanceolate, 2.5-3 mm. long, acute; petals about equalling the 

 sepals. 



The type was named SteUaria borealis by Dr. Watson but is 

 evidently not closely related to it. A . Palmeri has the thick lea\es 

 of A. Edivardsii (R. Br.) Rydb., but the midribs are not prominent, 

 the flowers smaller, the sepals decidedly acute, and the petals only 

 about equalling the sepals in length. 



Utah: Beaver Valley, 1877, E. Palmer 54 (type, in herb. 

 Columbia University). 



Alsine alpestris (Fries) Rydb. comb. nov. 

 Stellar ia alpestrisY vies, ^IsiWt. 1: 10. 1832. 



Alsine strictiflora Rydb. nom. nov. 

 SteUaria stricta Richards. Frankl. Jour. ed. 2. App. 15. 1823. 



Not Alsine stricta Wahlenb. 1812. 



This is the SteUaria longipes of most western reports and of 

 Coulter & Nelson's New Manual. It has a short pod and acute 

 sepals, while the original SteUaria longipes Goldie has the pods 

 twice as long as the obtuse sepals. If I am not mistaken the latter 

 is the same as SteUaria valida Goodding. 



Alsine subvestita (Greene) Rydb. comb. nov. 

 Stellaris subvestita Greene, Ottawa Nat. 15: 42. 1901. 



