626 PROCEEDINGS OF THE AMERICAN ACADEMY 



But a comparison which has been obligingly made at Kew with 

 the unique original specimen belonging to the Herbarium of Trinity 

 College, Dublin, shows that to be a different species, of more 

 southern habitat, to which a specimen collected by Dr. Horn in 

 Ovvens's Valley or at Fort Tejon seems, to belong. . As the species now 

 at length discriminated and characterized was probably (after Mr. 

 Bridges) first collected by the chief and Nestor of our science, of 

 whom we have just been bereaved, it may most appropriately bear his 

 venerated name.* 



Astragalus Lemmoni. Oroboidei : striguloso-puberulus ; cauli- 

 bus e radice perenni adscendentibus diffusis gracillimis 1 - 2-pedalibus 

 ramosis; foliolis plerisque 5-jugis lineari-oblongis (lin. 4 longis); sti- 

 pulis discretis triangulari-lanceolatis petiolo brevi saepius aaquilongis ; 

 pedunculis folium adaequantibus ; racemo spiciformi oblongo densi.- 

 floro ; floribus patentissimus parvis (lin. 3 longis) ; calycis dentibus 

 attenuato-subulatis tubo campanulato ajquilongis ; vexillo emarginato 



* The Euhosaclcice vera,, with obviously pinnate leaves and developed stipules, 

 may readily be distinguished as follows : — 

 Stipules ample and foliaceous : the umbel many-flowered : 

 calyx-teeth short. 

 Very silky-villous : leaf-like bract near the umbel . . H. incana. 



Villous-pubescent and viscid : the bract or leaf remote . H. stipularis, 



Stipules scarious. 



Bract much below the many-flowered umbel : calyx-teeth 



very short H. crassifolia. 



Bract (when present) borne at the summit of the 

 One -four-flowered slender peduncle. 



Leaflets 5 - 9, obovate or linear : bract 3-foliolate . H. angustifolia. 



Leaflets 5-7, linear-lanceolate, acute at both ends : 



bract 1-foliolate or none H. lathyroides. 



Several- (5 - 10-) or only from the lowest axils 2-4-flow- 

 ered peduncle. 

 Minutely appressed-pubescent, except below : bract 1 - 



foliolate : corolla yellow and purplish . . H. oblongifolia. 

 Soft or silky -pubescent : bract 1 -3-foliolate : vexillum 



yellow; wings and keel white . . ... H. Torreti. 



Glabrous throughout or nearly so : claws of the petals 

 elongated. 

 Bract none, or a scarious rudiment : vexillum and 



keel yellow; wings white .... H. bicolor. 



Bract 3-foliolate ; vexillum yellow ; keel and wings 



rose-purple H. gracilis. 



