﻿PLANTiE PRATTENIANiE CALIFORNIC/E. 91 



tips. Rajs white, longer than the white pappus. Achenia linear-obconic, pubescent, 

 about one half the length of the pappus. It has many points of resemblance with 

 Aster Mentziesii, Lindl., from which it differs, however, in its oval leaves, white rays, 

 and achenia not compressed. 



ASTER radula ? var. nov. Heads rather larger and more numerous than in our 

 Eastern species. 



A. -Durandii, Nutt. Gambel's plants, in Jour. Acad. Nat. Sci., 2d series. Very 

 much like Lindley's A. falcatus, and probably the same. 



ERIGERON Douglassii, Torr. and Gr. Fl. Am. vol. ii. p. 177. 



SOLID AGO California, Nutt. in Torr. and Gr. Fl. Am. vol. ii. p. 203. 



HELIOMERIS simplex, spec. nov. Caulis gracilis, erectus, simplex, 12 — 15-polli- 

 caris, uniflorus, et pariter cum foliis, pilis albidis, appressis, basi dilatatis parce obtectus. 

 Foliis oppositis vel alternis, lanceolatis acutis, scabris, in petiolum brevem desinentibus 

 interdumve sessilibus, ad basim prassertim ciliatis; squamis involucralibus biserialibus, 

 oblongo-lanceolatis acutis ; radii floribus luteo-aurantiacis, oblongo-ovatis, obtusis, 

 obscure striatis, involucro duplo longioribus, sterilibus ; disci corollis fusco-purpureis ; 

 achamiis compressis, glabris, calvis.. 



I have the same plant from the head of Rio Laguno, collected by Dr. Heermann, 

 and, in all my specimens, the form is the same ; stem simple, erect, one-flowered, not 

 above 15 inches high, with a small tap root. The stem and leaves are sparingly 

 covered with appressed, simple, white scabrous hairs, squamiform at base. The 

 leaves are about 2" apart, less than 2" long and 3'" broad ; they are opposite or alter- 

 nate, scabrous, and ciliate, with a very short hairy petiole, or sometimes sessile. The 

 scales of the involucre are in two equal series, oblong-lanceolate acute. Rays 12 — 15, 

 oblong-oval, obtuse, obscurely striate, and of light orange color ; disk corollas dark 

 purple, with a short limb. Achenia compressed, smooth, devoid of pappus. Called 

 by the Mexicans Ojo de Gallo. 



AGARISTA calliopsidea, D. C. Torr. and Gr. Fl. Am. vol. ii. p. 338. 



LEPTOSYNE Stillmanii, (Gray in litt.) " Foliis inferioribus oppositis, omnibus 

 trifidis seu pinnato — 5-partitis, segmentis rachique planis, anguste-linearibus ; squamis 

 involucri externi oblongis, corollis haud annulato-barbatis ; appendicibus styli florum 

 disci haud apiculatis ; radii orbiculatis, margine fungoso subrugoso cinctis ; achasniis 

 glaberrimis. In the valley of the upper Sacramento. Dr. Stillman." 



" The single specimen collected is about a span high, with shorter and coarser 

 leaves than L. Douglassii, and smaller heads. The scales of the exterior involucre 

 are broader, shorter, rather fewer, and externally sparingly bearded at their base. 



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