OF ARTS AND SCIENCES : JUNE 14, 1870. 275 



superantibus ; corolla? tubo (sesquilineari) calycera vix superante ; 

 limbo parvo ; anther is fauci insertis subsessilibus ; ovulis in loculis 2. 

 — New Mexico and western frontiers of Texas, Wright, Bigelow, to 

 Utah, S. Watson. 



§ 9. IPOMOPSIS, Benth, pro parte. Flores thyrsoideo-paniculati, 

 parum bracteati. Corolla (plerumque coccinea) tubuloso-infun- 

 dibuliformis, tubo sensim sursura ampliato calycis lobos subula- 

 tos suosque lobos ovatos sen lanceolatos patentes multum supe- 

 rante. Stamina fauci corolla? vel sub sinubus inserta, lobis baud 

 longiora. Ovula in loculis plurima. — Biennes, glabella? seu 

 pilosula? ; eaulibus elongatis ; foliis semel pinnatifidis ; floribus 

 speciosis. Jpomopsis, Michx. Ipomeria, Nutt. 



I confine this group to the original species and two others nearly 

 related to it. • As arranged by Bentham it comprised two or three here 

 referred to Eugilla. As to G. longi flora and G. glomeruli flora, they 

 prove to have very unequally inserted stamens, which is the sole 

 character of Collomia. The tendency to dimorphism, of which there 

 are traces, or perhaps rather incipient manifestations, in various portions 

 of the genus, is most marked in G. aggregata. The included stamens 

 of G. subunda perhaps belong to the short-stamened form of the spe- 

 cies, but no other is known. 



* Caules alte foliosi, foliis pinnatipartitis, segmentis filiformibus seu 

 angusto-linearibus. 



44. G. coronopifolia, Pers., Benth. cum syn. Prodr., et G. Flori- 

 dana, Don, & G. Beyrichiana, Bouche. Elata ; thyrso virgato com- 

 pacto ; corolla? lobis ovatis subpatentibus filamentis parum longioribus ; 

 seminibus humefactis nee mucilaginosis nee spirillifens ! tegumento 

 externo laxo et grossius et tenuissime reticulato. — South Carolina to 

 Florida and Texas. 



45. G. aggregata, Spreng., Torr. Bi— quadripedalis, versus pani- 

 culam laxam sa?pe ramosamnudiuscula ; floribus suaveolentibus ; calyce 

 sa?pissime glanduloso, lobis subulatis ; corolla? tubo angusto, lobis ova- 

 tis seu lanceolatis acutis patentissimis mox recurvis ; filamentis aut e 

 tubo exsertis aut inclusis ; seminibus mucilaginosis et spirilliferis modo 

 generis. — G. aggregata (Cantua, Pursh !) & G. pulchella (Dough), 

 Benth. cum syn. Prodr. — From Upper Platte and Missouri to the 

 Columbia and the Pacific, and south to Arizona. The original Can- 

 tua aggregata is one of the forms with long and narrow calyx-lobes. 

 The opposite extreme is — 



