OP ARTS AND SCIENCES. 221 



pidato-mucronatis margine hinc inde spinuliferis sessilibus, floralibus 

 arapliatis lato-ovatis iliciformil)us venulosis margine sjiiiiulis gracilibus 

 armatis capitula sessilia pi. m. glomerata fulcrantibus paululum super- 

 antibus ; corolla albida. 



Hecastoclkis Siiockleti, — Very arid district, at Candelaria, 

 Esmeralda Co., Nevada, W. S. ShocMey. A remarkable addition to 

 the few known North American Mutisiacece, to stand near AinsUcca, 

 but ahngether sui generis and of peculiar habit. The generic name 

 alludes to the separate enclosure of each flower in its involucre. 



CuEi'is PLEUROCAUPA. Inter C. occidenlaJem et C. acuminatam. 

 quasi media, pube minuta cinerea demum decidua; caulibus subaphyl- 

 lis ; foliis runcinato-dentatis incisisve ; cyma paniculiformi laxa ; capit- 

 ulis angustis paucifloris ; acheniis oblongis sursum baud attenuatis 

 eximie alato-10-costatis pappo paullo brevioribus. — Head-waters of 

 the Sacramento, above Strawberry Valley, on wet slojies of the moun- 

 tains, at the altitude of about 7,500 feet, 1881, Pringle. The short 

 and thick akones, with at least ten narrow and very salient ribs, almost 

 wings, sei)arated by broad grooves, distinguish this species. 



LoBKLi.A. Gattingeri. L. appendiculatce sat similis ; floribus 

 minoribus (lin. 3 longis) ; calycis lobis baud ciliatis attenuato-subula- 

 tis fere inappendiculatis basi utrinque callo minimo instructis, fructi- 

 feris capsula brevioribus ; pedicellis quandoque bracteolatis. — Middle 

 Tennessee, in springy places of calcareous bluffs and in cedar bar- 

 rens. Dr. Gattinger. No. 1 G37 of the distribution of A. H. Curtiss, 

 under the name of L. leptostachys. Flowering May and August, 

 from a monocarpic root. 



GiTHOPSiS diffusa. Demum effuse ramosissima; ramis gracili- 

 bus; foliis parvis ; calycis lobis lanceolatis (basi latioribus) corollam 

 subfcquantibus ovario pra^sertim capsula fere lineari arete sessili sub- 

 dimidio brevioribus ; seminibus turgide oblongis. — On Cucamonga 

 Mountain, S. California, June, 1881, S. B. 4- W. F. Parish. The 

 capsule opens apically, as in the original species.* The blue corolla is 

 only 2 lines in length. 



Androsace Arizonica. E grege A. occidenfalis, tenella; scapis 

 debilibus decumbentibus radiisque umbella) pauciflora; capillaribus 

 elongatis ; foliis phyllisque involucri consimilibus brevibus ; calycis 

 lobis foliaceis, fructiferis accrescentibus ovatis radiato-patentibus tube 



* Baillon's statement to the contrary is foundod on a misapprehension, he 

 evidently having taken a Texan Specularia for Gcthopsis. See Bull. Soc. Linn. 

 Par. 304. 



