270 PROCEEDINGS OF THE AMERICAN ACADEMY 



4-plo longioribus corollam flavam (I'm. 3-4 longara) adrequantibus ; 

 ovulis in loculis 1-3. — Sierra Nevada, at Ebbett's and Amador Pass, 

 alt. 8,000 feet, Brewer. From the W. Humboldt Mountains, Nevada, 

 to the Wasatch, G - 9,000 feet, S. Watson. 



25. G. leucocephala. Gracilis, 3 - 6-pollicaris, haud glandu- 

 losa; ramis infra capitulum densum retrorsim pubescentibus ; foliis 

 subflaccidis glabris, segmentis filiformibus saspius indivisis, floralibus 

 etiam vix pungentibus ; calycis tubo sinubus saltern villoso-pubescente ; 

 corolla alba (lin. 4 longa) calycem superante, lobis staminibus soepius 

 brevioribus ; ovulis in loculis 2. — Navarretia leucocephala, Benth. PI. 

 Hartw. p. 324. — California, chiefly on the Sacramento and its tribu- 

 taries. 



26. G. Navarretia, Steud., Nav. involucrata, Ruiz & Paw, the 

 original and only Chilian species, appears to be nearer G. leucocephala 

 than to G. cotulcefolia ; but in fact the three species approach each other 

 too nearly. 



* * * Folia semel pinnatifida vel incisa, paucave fere integerrima : 

 stamina e fauce corolla? violaceo-purpurea? nunc alba? vel luteola? 

 pi. m. exserta : calycis lobi integerrimi vel in G. viscidula rariter 

 laciniati. 



h— Gracillima?, ramis foliisque paucisectis filiformibus : bractea? fere 

 palmatipartita?. 



27. G. filicaulis, Torr. in herb. Erecta, spithama?a, superne 

 minutissime glandulosa ; ramis tenellis pedunculiformibus effuse pani- 

 culatis ; foliorum segmentis rhachique subsetaceis ; corollas violacere 

 tubo tenero calycis lobos lanceolato-subulatos parum pungentes longe 

 superante; ovarii loculis uni-(raro bi-?) ovulatis. — California, Jef- 

 fray, no. 1474, in herb. Kew. Also Bear Mountain, Mariposa County, 

 Torrey. Leaves sparse. Heads small, rather naked. Flowers 

 nearly three lines in length, exceeding the palmately few-cleft inner 

 bracts. 



28. G. divaricata, Torr. in herb. Diffusa, nunc patentissima, 

 3 - 6-pollicaris, superne viscidulo-pubescens, ramis proliferis pedunculi- 

 formibus; foliorum segmentis rhachique subulato-filiformibus, bractea- 

 rum magis pungentibus ; corolla? purpurea? vel luteola? tubo infundi- 

 buliformi calycis lobis setaceo-subulatis pungentibus parum longiore ; 

 ovarii loculis o - 7-ovulatis. — California, alone; the foot hills of the 

 Sierra Nevada, coll. Shelton, Rattan, Bolander, Torrey, Mrs. Davis, 

 C. Lee. — Flower from three to five lines long. 





