OF ARTS AND SCIENCES : JANUARY 26, 1870. 195 



caudatis. — San Felipe, California, Dr. Antisell, in Parke's Expedi- 

 tion. The beautifully fringed and conspicuously tail-pointed seg- 

 ments of the perigonium are commonly exserted two lines beyond the 

 orifice of the involucre. 



7. C. fimbriata, Nutt. PI. Gamb. p. 1G8 ; Torr. in Pacif. R. R. 5, 

 Bot. t. 8. Humilis, subvillosa vel glabella ; involucri dentibus validis 

 subulatis aristatis tubo paullo vel dimidio brevioi'ibus ; perigonio 

 minus exserto, segmentis infra apicem oblongum obtusum irregulariter 

 lacero-fimbriatis. — Abundant on dry hills near San Diego, Nuttall, 

 Parry, Thurber, &c, and east to the Mohave River, Thomas, Cooper, 

 &c. This was collected by Botta many years ago, from whose speci- 

 mens, preserved at the Jardin des Plantes, a drawing was long ago 

 made by Decaisne and engraved for Mirbel, who was to have pub- 

 lished Botta's collection. 



•n- -n- Perigonii segmenta integerriina vel apice tantum crenulata. 

 Caules subundi. 



8. C. staticoides, Benth. Eriog. 1. c. Erecta (bipollicaris ad 

 pedalem) ; foliis plerisque radicalibus spathulatis oblongis rotundisve 

 hirsutulis subtus plerumque tomentosis ; cyma effuse corymbosa ; invo- 

 lucri dentibus subulatis breviter aristatis seu aristulatis, inrequalibus, 

 majorihus tubo angusto 2 - 3-plo brevioribus. — G. nudicaule & C. dis- 

 color, Nutt. 1. c. From San Luis Obispo and Santa Barbara County, 

 Brewer, Torrey, to San Diego, Nuttall, &c, and Fort Tejon, Xantus 

 (published as C. procumbens). 



9. C. proctoibens, Nutt. 1. c, Benth. in DC. Demissa, sub- 

 hirsuta ; foliis spathulatis ; ramis (poll. 2-4 longis) diffusis vel de- 

 cumbentibus ; cymulis irregularibus paniculatis ; involucri dentibus 

 corniformibus subulato-aristatis, 2-4 majoribus tubo parum brevi- 

 oribus. C. uncinata, Nutt. 1. c. — San Diego, &c, Nuttall, Thurber, 

 Blake. A depressed plant, very fragile with age, and the awns more 

 constantly uncinate than in related species. Tube of the involucre 

 barely a line long. 



10. C. uniaristata, n. sp. Diffusa, pube molli subcinerea ; foliis 

 spathulatis subtus piloso-pubescentibus ; cymulis laxiusculis ; bracteis 

 aristatis ; involucri dentibus corniformibus, unico arista recta valida 

 tubo brevi-oblongo paullo vel subduplo longiore, ceteris cuspide 

 brevi superatis ; staminibus 3. — New Idria, California, in very dry 

 places, Brewer. Achenium slender. Embryo straight or very 



