OF ARTS AND SCIENCES. 75 



siorihus viridiilisciuo, in l)r;icto()las pcilicolli Krevis traiisciuililiiis ; .styli 

 aitpeiidiciltiis tenui-subulatis parti stiginatifonc latiori a'liuiloiijris ; 

 acliciiiis soiiceo-villosis subturhinatis, — Near the entrance; of the 

 TantiUas Groat Canon, in Lower ("alifornia, near the borders of the 

 State, Dr. E. Pahner. Tliis sin^idarly i'eseiid)les our Aji/opti/t/ms 

 cuneatus ; but it has no trace of rays ; the leaves arc (U'stituto of 

 ghitiuous exudation and are obscurely when at all punctate ; tiie scales 

 of the involucre are not carinate ; the akenes shorter and silky ; and 

 tlie bristles of the pappus not (as in that plant) clavellate-thickened. 

 It must stand near to 7i. jVeiuiesii ; but the style-appendages are as 

 in the Chrysothamnus section. 



BiGKLoviA (Chuysotiia^inoi'Sis, post No. 15 revisionis) Engkl- 

 MANNi. Spithaiua^a et ultra e basi truticosa, fere glabra et viridis ; 

 foliis crebris angustissime linearibus rigidulis nuicronato-acutatis paten- 

 tibus (poll. 1-2 longis seiiiilin. ad lineam latis), costa valida; capitulis 

 sessilibus fastigiatim coryniboso-glonieratis ; involucro oblongo-tur- 

 bipato lo-20-floro, squamis oblongo-lanceolatis cuspidato-acuminatis, 

 exterioribus sensim brevioribus baud folioso-appendiculatis ; corollis 

 5-dentatis ; appendicibus styli breviter crassiuscute subulatis ; acheniis 

 lineari-oblongis glaberrimis. — Plains of the eastern part of Colorado, 

 at Hugo Station on the Arkansas Pacific Railroad, Dr. p]ngelmann 

 and Dr. Parry, 1874 ; H. N. Patterson, 1875. 



Pjigelovia Greenei. (Chrysothamnus, * * h- ante No. 19 

 revisionis.) Pedalis, glaberrima ; foliis angustissinie linearibus 

 mucronatis minutim remotiuscule hirtello-ciliolatis ; capitulis corym- 

 boso-fasciculatis angusto-oblongis ; invohicri squamis oblongis niargine 

 tenuiter scariosis apice subito caudato-acuniinatis ; pappo rigidulo. — ■ 

 Huerfano Plains, southern part of Colorado, Rev. E. L. Greene, 

 1872. 



DiPLOSTEPHiUM CANUM. (ApLOSTEPHiUM, ligulis paucis parvis 

 stylo suo brevioribus, pappo simplici.) Frutex ramosus, validus, to- 

 mento implexo dealbatus ; foliis spathulatis vel angusto-oblongis basi 

 attenuatis subpetiolatis integerrimis plauis e costa valida subreticulato- 

 venosis ; capitulis laxe cymosis vel subpaniculatis, primariis in dicho- 

 tomiis sessilibus ; involucro brevi-oblongo crebre tomentoso, squamis 

 obtusis ; floribus purpurascentibus, radii 4—6, ligula inconsjncua disco 

 breviore 2-3-dentata; disci 12-20, corollis 5-dentatis, appendicibus 

 styli brevibus acutiusculis ; acheniis linearibus subcompressis 4-5- 

 nerviis sericeo-hirtellis ; pappo e setis rigidulis plerunique a^quali- 

 bus, vel perpaucis exterioribus minimis. — Guadahijje Island, off 



