328 PLANTS NOV^ THURBERIANiE. 



*^* Of the Leguminous tree mentioned on p. 313, some fruiting specimens occur in 

 the collection made by Dr. J. M. Bigelow, in Lieut. Whipple's expedition ; and Mr. 

 Thurber has fortunately just received others, with a few blossoms, in a small collection 

 made on the Gila by Mr. Gray. The plant appears to be most nearly allied to the 

 South American genus Coursetia, DC, to which, however, it cannot well be annexed ; 

 and perhaps it may be added to the group of genera enumerated by Mr. Bentham (in 

 PI. Jungh. p. 249), as making a transition from the Galegeee to the Dalbergiese. As 

 it appears to constitute a new generic type, I am happy to further Mr. Thurber's 

 wishes that it may bear the name of our common friend and excellent botanical 

 associate, Stephen T. Olney, Esq., author of the Catalogues of the Plants of Rhode 

 Island, &c. 



OLNEYA, Nov. Gen. Leguminosearum. 



Calyx campanulatus, quadrilobus ; lobis ovatis obtusissimis, supremo latiore emar- 

 ginato-bifido. Vexillum orbiculatum, profunde emarginatum, reflexum, unguiculatum, 

 auriculis latis inflexis appendiculatum, bicallosum. Alse oblongae carinam incurvam 

 obtusam sequantes. Stamina 10, eequilonga, filamento vexillari libero diadelpha : an- 

 therse uniformes. Discus cupularis. Ovarium substipitatum, pluriovulatum : stylus 

 incurvus, supra medium undique villosus : stigma depresso-capitatum. Legumen 

 turgidum, dispermum, vel saepissime medio seu prope apicem monospermum, obliquum, 

 utrinque constrictum, glandulosum, tarde dehiscens, valvulis crasso-coriaceis. Semen 

 magnum, estrophiolatum, ovale. Cotyledones carnosse, crasso-planas, radiculas gracili 

 incurvse accumbentes. — Arbor 15 - 20-pedalis, pube minuta canescens ; aculeis in- 

 frastipularibus geminis, interdum nuUis ; foliis abrupte vel impari-pinnatis multijugis ; 

 stipulis obsoletis ; stipellis nuUis ; pedunculis folio brevioribus racemoso-plurifloris ; 

 corolla alba vel purpurascente. 



Olneya Tesota. — On the table-lands of the Gila, Mr. Thurber, Mr. Gray. Near 

 » Bill Williams' Fork," Dr. Bigelow. 



