274 University of California Publications in Botany [VOL. 9 



and present in California, occurs in the Sierran region in the Tran- 

 sition and not infrequently rises to our lower boundary (between Lily 

 Lake and Glen Alpine, Tahoe, 6,900 feet, Smiley 394; Tioga Road, 

 Yosemite, between Aspen Valley and White Wolf, 7,000 feet, Smiley 

 896). 



Epilobium saximontanum Hausskn. (I.e.), a species of Colorado 

 and Utah, is not certainly known from the Sierra Nevada, though a 

 plant collected upon Castle Peak, in the Hudsonian life-zone, at 8,800 

 feet, presents characters suggesting that species (Smiley 478). 



4. ZAUSCHNEKIA 



1. Zauschneria latifolia Greene, Pitt., vol. 1, p. 26. 1887. 



Z. oalifornioa var. latifolia Hook., Bot. Mag., t. 4493. 1850. 



Type locality. Not given. The original description drawn in part 

 from plants grown in England from seed collected in California. 



Range. Southern Sierra Nevada and South Coast Ranges. 



Zone. Arid Transition and rising rarely to timber-line. 



Specimens examined. Mountain slopes along Little Kern River, 

 9,300 feet, low shrub 10-12 inches high, Purpus 5226 ; Sardine Canon, 

 Tulare County, 11,000 feet, Austin 353 ; Mt. Silliman, Mrs. Brandegee, 

 August 24, 1905. 



This species is of interest because it represents a factor in the high 

 mountain flora, whose constituent species have undoubtedly been 

 derived from the endemic genera of the Californian-Mexican region. 



Several small annuals, with minute red flowers and seeds without 

 a coma, belonging to the genus Gayophytum, are sometimes seen within 

 our borders (i.e., G. caesium, Suzy Lake, Tahoe, 7,600 feet, Smiley 

 195; G. ramosissimum, Tioga Road, Yosemite, 6,500 feet, Smiley 903), 

 but they are essentially Upper Sonoran and Transition species and in 

 no sense an integral part of the boreal Sierran flora. When found, 

 they are always on dry, south or west facing slopes, where the life 

 conditions, at their season of growth, are those of lower zones. 



42. CORN ACE AE (DOGWOOD FAMILY) 

 1. CORNUS 



1. Cornus stolonifera Michx., FL, vol. 1, p. 92. 1803. 



C. alba L., subsp. stolonifera (Michx.) Wangerin, Pflanzenr., Bd. 4, Heft 

 229, s. 53. 1910. 



Type locality. "Hab. ad ripas amniumque rivorumque Canadae 

 et Novae Angliae. ' ' 



