OP ARTS AND SCIENCES. 327 



* Helmintuospermum Torr. in herb. Corolla subrotata, plicis 10 

 faucialibus transversis subcallosis a staniinibus longe remotis in- 

 structa ! 



44. P. MiCRANTHA ToiT. Bot. Mex. Bound, p, 144. Tenera, 

 laxe ramosa, liirsutula, glandulosa ; fbliorum segmentis ;3-9 oljovatis 

 oblongisve obtusissimis, imis petiolo marginato, superioribus basi dilatata 

 nunc auriculato-subamplexicaulibus ; racemis pauiculatis geminatisve 

 perlaxitloris ; corolla (saepius cairulen) sepala acciescentia obovato- 

 spathulata parum superante ; capsula globosa 20-24-sperma. — New 

 Mexico, from the Rio Grande, to Arizona and the eastern frontier of 

 California, and S. Utah. The ordinary vertical jjlicoe rising from the 

 base of the tube of the corolla wholly wanting ; but a pair of trans- 

 verse obtuse folds, high up on the broad tube, stretch from each side 

 of the midvein of the lobes nearly to the lateral vein sent off from 

 its base. Seeds cylindraceous, incurved, very deeply corrugated and 

 tuberculate. 



* * MiCROGENETES VERA. Corolla infundibuliformis vel cyliudracea, 

 sagpius plicis verticalibus angustis basi filamentorum pi. m. adnatis 

 instructa : stylus in nostris inferne pilosulus : semina j^ra^ter corru- 

 gationem minute reticulata. S[)ec. omnes Am.-Occidentales, una 

 Chilensis. — Microgenetes A. DC. Phacelia § Euglypta Watson, 1. c. 



•»— Corolla (alba sen pallida) calyce parum longior: folia vix bipinna- 

 tifida: capsula oblonga 12-24-sperma. 



(44".) P. CuMiNGii. Eutoca Cumingii Benth. I.e.; Gay, Fl. Chil. 

 t. 53. Microgenetes Cumingii A. DC. 1. c. p. 292. — Stylus glaber. 

 Corolla plicis destituta. — Chili. 



45. P. IvESiANA Torr. in Ives, 1. c. ; "Wats. Bot. King, p. 254. — 

 Corolla plicis a filamento fere liberis instructa. — Utah to Arizona and 

 the border of California. 



^— -i— Corolla calyce 2-3-plo longior, tubo cum fauce albidavel flavida, 

 limbo saepissime cteruleo seu violaceo. 



•H- Folia tantum pinnatifida: racemi spiciformi elongandi : plicjE corollas 

 filamento longius adnatae : capsula 20-30-sperma. 



4G. P. Fremontii Torr. I.e. — S. Utah and Arizona to California. 

 *-> ++ Folia bipinnatipartita : semina pauciora, breviora, minus corru- 

 gata : {)licifi corollie elongatce angustte filamento lougissime tubulatim 

 adnatae. 



471 P. BICOLOR Torr. in Wats. 1. c. — Nevada and adjacent border of 

 California. Corolla unusually long for the subgenus (from 5 to 7 lines) : 



