148 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



This is evidently nearly related to H. Kingii, and may grade into it. The origi- 

 nal specimens and those collected by H. Engelmann are considerably hairy and in habit 

 very unlike any form of H. Kingii ; Shockley's specimens, on the other hand, approach 

 that species much more closely. H. eremica grows in the alkaline flats of western 

 Nevada. 



Nevada: Coville & Funston, No. 366, 1891 (type); H. Engelmann, Nos. 22 and 23, 

 1859; T. S. Brandegee, 1885; W. H. Shockley, No. 533, 1886; No. 237, 1882. 



37. Horkelia Kingii (Wats.). 



Ivesia Kingii Wats. King's Rep. 5:91 and 448. 1871. 



Brewer & Wats. Bot. Cal. 1: 184. 



Potentilla Kingii Greene, Pittonia, 1: 105. 1887. 



Ivesia pallida Greene, Mss. in herbarium. 



Illustrations: Plate 90, f. 1 ; dissection of flower, /. 2; pistil,/. 3; stamen,/. ^; 

 fruiting hypanthium and calyx, / 5. 



Root thick, deep and woody, crowned with a very short erect caudex. Stems sev- 

 eral, leafy, glabrous, prostrate, 2-4 dm. long. Stipules ovate, 5-8 mm. long, entire. 

 Basal leaves numerotis, glabrous and shining, about 5 cm. long, pinnate, with 20-25 

 pairs of crowded leaflets, glabrous ; leaflets 3-5 mm. long, divided to the base into 2-4 

 ovate or oblong segments. Cyme narrow, with slender pedicels 5-10 mm. long. Hypan- 

 thium saucer-shaped, in fruit 3-4 mm. in diameter ; bractlets ovate or lanceolate, about 

 half as long as the broadly lanceolate sepals. Petals white, obovate or broadly spatulate, 

 much exceeding the sepals. 



It is very variable in the size and form of the leaflets and of the cyme. The speci- 

 mens labelled I. pallida Greene are unusually large and leafy and have many-flowered 

 and rather flat-topped cymes. It grows in the valleys of the Great Basin, especially in 

 alkaline soil. 



Nevada: Watson (King's Exp.), No. 348, 1862 (Monitor Valley) ; M. E. Jones, No. 

 2187, 1881; K. Curran, 1883 (7. jsaW-ida Greene) ; E. L. Greene, 1893 (Humboldt Wells). 



Utah: M. E. Jones, 1891 (Deep Creek); No. 5408, 1894 (Monroe). 



§ 10. LYCOPODIOIDES. 



38. Horkelia Muirii (Gray). 

 Ivesia Muirii Gray, Proc. Am. Acad. 8: 627. 1873. 



Brewer & Wats. Bot. Cal. 1 : 183 ; Rattan, An. Key W. Coast Bot. 52. 



