OF ARTS AND SCIENCES : JUNE 14, 1S70. 267 



Corolla alba fauce flava, tubo extus puberulo, lobis obovatis. 

 Filamenta brevia e fauce subexserta : antheras ovali-oblongae. — 

 Sip/wnella, Nutt. in herb. 



15. G. Nuttallii, n. sp. Spithamam ad pedalem ; caulibus e basi 

 suffrutescente plurimis simpliciusculis ; foliis 3 - 7-partitis internodio 

 saepius brevioribus, segmentis angusto-linearibus raucronatis (lin. 6-9 

 longis) ; floribus in glomerulum foliosum confertis; ovulis in loculis 

 binis. — Siphonella montancr & S. parviflora, Nutt. herb. — Rocky 

 Mountains of Colorado and Utah to the Sierra Nevada in California, 

 Nuttall, Fremont, Anderson, Brewer, Watson. — Tube of corolla four 

 or five, the lobes two or three lines long. 



16. G. floribunda, n. sp. Ultrapedalis ; caulibus e basi frutes- 

 cente ramosis gracilibus ; foliorum segmentis fere acicularibus interno- 

 dia saapius adaequantibus ; floribus laxiuscule corymboso-cymosis, non- 

 nullis pedicellatis ; ovulis in loculis 4 : cast, fere prascedentis. — Cali- 

 fornia, probably on S. E. borders, Coulter, no. 454. Lower California 

 50 miles S. of San Diego, E. TV". Morse, 1866, ex A. Wood. Pine 

 woods of Arizona, Coues and Palmer, 1865. — Flowers "delicate- 

 scented," rather larger and much more numerous than those of G. 

 Nuttallii (some forms of which nearly approach it), either densely 

 or loosely cymose-clustered at the extremity of copious paniculate or 

 corymbose branchlets. 



§ 5. LEPTODACTYLON, Benth. Corolla hypocraterimorpha, 

 tubo e calyce demum pi. m. exserto, fauce subinfundibuliformi-am- 

 pliata. Stamina fauci vel infra faucem inserta: filamenta brevia 

 vel brevissima : antheras breves inclusag. Ovula in loculis plu- 

 rima. Semina tegumento conformi, humefaeta nee mucilaginosa 

 nee spirillifera ! — Perennes, suffruiicosae, nunc caespitosas, foliosis- 

 simas ; foliis alternis vel in unica oppositis et in axillis fasciculatis 

 palmatipartitis, segmentis integerrimis cum calycis lobis acerosis 

 subulatisve pungentibus ; floribus roseis lilacinis albisve concin- 

 nis aut cymuloso-confertis aut solitariis ramulos breves terminan- 

 tibus sessilibus. — Leptodactylon, Hook. & Arn. 



* Folia in caulibus brevibus fere herbaceis opposita ! 



17. G. Watsoni, n. sp. Hirtello-scabrida, subglandulosa, nunc 

 glabrata ; caulibus gracilibus (circ. spitbamaeis) fere herbaceis e caudice 

 lignescente crasso ; foliis 3-5-partitis patentissimis, segmentis tenui- 

 acerosis internodiis saspe brevioribus ; calycis lobis tubo dimidio brevi- 



