— in- 

 verse forms, of which caespitosum, nudum, polystachyum and 

 ramosum have been given names by Mr. Eaton. Until Mr. 

 Eaton proposed for it its present name, it had been referred to B. 

 variegatum, E. laevigatum, B. robustum, and more recently to B. 

 Mexicanum. 



Equisetum robustum A. Br. This species is not rare through- 

 out the State. In the south it grows by streams and in marshy 

 places, in the mountains, at 2,500 to 5,000 feet alt. 



Equisetum hyemale L. This species has been reported from 

 several parts of this State, but according to Mr. Eaton, it is not 

 even American. He recognizes, however, the following varieties, 

 namely : var. Calif ornicum Milde, ranging from San Francisco to 

 Nevada and Bitish Columbia ; var. herbaceum A. A. Eaton, 

 Kaweah river and Kernville ; var. intermedium A. A. Eaton, 

 Monterey county. 



Equisetum laevigatum A. Br. The only California specimens 

 of this species identified by Mr. Eaton were from Panamint Mts. 

 and Kern river. In the Botany of California it is reported from 

 Santa Clara county. 



SELAGINELLACE^E. 



Selaginella Bolanderi Hieron. The type of this species was col- 

 lected on shaded nooks, near Auburn, April, 1865, by H. N. Bo- 

 lander, and is No. 451 1 of his distribution. 



Selaginella Watsoni Underw. A plant of high altitudes in the 

 Sierra Nevada, growing in rocky places at 6,000 to 10,000 feet alt., 

 from San Jacinto Mt. to Alpine county, and probably further 

 northward. 



Selaginella Hansenii Hieron. The following specimens are 

 cited in the original description of this species : Mokelumne river, 

 near Fisher's Cabin, in the Sequoia forests, by Geo. Hansen, No. 

 878, April, 1893; Oakland Hills, Hillebrand, 1863; Sierra Nevada 

 Mts., in Fresno county, A. A. Eaton, 1892. 



Selaginella Bigelovii Underw. An abundant species of the 

 southern counties, ascending the mountains at least to 3,500 feet 

 alt. It grows in stony soil, at the base of rocks, or in clay soil in 

 the shelter of shrubs. 



Selaginella cinerascens A. A. Eaton. In the coast mountains 

 of San Diego county. The type was collected by Miss Kimball, 



