70 THE WEST AMERICAN SCIENTIST. 



Lavatera insularis, Watson. A widely branching shrub, 3-6 ft. 

 high; not an herbaceous perennial, as supposed by Mr. Watson. 

 The flowers are exactly those of L Guadaloupensis, but the foliage 

 and the involucres are different. 



Erodium cicutarium, L'Her. 



Rhus integrifolia, Nutt. 



Trifolium tridentatuin, Lindl. 



Hosackia glabra, Torr. 



Astragalus leucopsis, Torrey & gray. 



Cotyledon (4 species undetermined), 



Echinocystis macrocarpa, Greene, 



Mamillaria Goodridgii, Scheer. Abundant at the summit of the 

 island, and very large. 



Cereus Emoryi, Engelm. 



Opuntia var. occidentalis, Engel. and O. prolifera, En gel. 



Mesembrianthemum aequilaterale, Harv. & M. crystallinum, L. 



Apiastrum angustifolium, Nutt. 



Daucus pusillus, Michx. 



Galium Rothrockii, Gray. 



Aplopappus squarrosus, Hooker & Arn. 



Gnaphalium ramosissimum, Nutt. 



Encelia Californica, Nutt. 



Leptosyne maritima, Gray. 



Perityle Californica, Benth. 



Baeria gracilis, Gray, and B. anthemoides, Gray, 



Eriophyllum confertiflorum, Gray, 



Amblyopappus pusillus, Hooker & Arn. 



Artemisia Californica, Less. 



Stephanomeria v,rgata, Bentham. 



Rafinesquia Californica, Nutt. 



Microseris linearif olia, Gray, 



Malacothrix insularis, Greene. On nearly level ground, just 

 above the cliffs of the northern shore of the island, abundant. 



Sonchus oleraceus, Linn. 



Gilia multicaulis, Benth. 



Nemophila aurita, Lindl. 



Phabelia ixodes, Kellogg, and P. distans, Benth. 



Krynitzkia barbigera, Gray, and K. maritima, Greene, 



Dichondra repens, Forst, 



Convolvulus occidentalis, Gray, 



Lycium sp.? 



Antirrhinum Nuttallianum, Benth. 



Collinsia bicolor, Benth. 



Mirabilis Californica, Gray, 



