OF ARTS AND SCIENCES : MAY 30, 1865. 545 



HELiAXTHrs EXiLis : Atimd, hirsutu?, nunc tantura scaber ; caule 

 gracili pedali et ultra ramoso ; foliis (oppositis superioribus alternis) 

 lineari-oblongis lanceolatisve subintegerriinis basi obscure trinerviis in 

 petiolum brevem atteniiatis; capitulis pro genere minimis; invobicri 

 squamis 10-12 lanceolatis foliaceis laxis ligulis 5 — 8 subdiraidio bre- 

 vioribus ; paleis receptaculi aristato-cuspidatis; acheniis glabris ; pappi 

 paleis ovato-lanceolatis. — In wet places about Clear Lake, H. N. Bolan- 

 der. A glabrate form from Owen's Valley, Dr. Van Horn. Leaves 

 an inch or an inch and a half long. Heads on almost filiform pedun- 

 cles ; the brown-purple disk only half an inch broad. Chaff of the 

 receptacle truncate-tricuspidate with the middle point projected into a 

 rigid awn, all but the outer chaff carinate-winged on the back. 



PuGiOPAPPUS BiGELOVii, Gray in Torr. Bot. Whipp. Exped., 

 Pacif. R. R. Rep. 4, p. 104. Add. char, gen.: Achenia plano-obcom- 

 pressa ; radii fertilia, ala suberosa cincta, calva ; caetera inania, disco 

 epigyno cylindrico styli basin cingente apiciilata, paleis pappi pugio- 

 niformibus demum deciduis. — Prof. Bi'ewer collected this very little 

 known plant on dry hills at San Buenaventura, in the southern part of 

 California, and also received it from Fort Tejon, collected by Dr. Van 

 Horn, with some fruit. 



Ch^nactis Xantiana (C. glahriuscula var. megacephala, Gray 

 in coll. Xantus, Fort Tejon, Jour. Bost. Nat. Hist. Soc, non Bot. 

 Whipp.) : C. heterocarphce affinis, sed robustior, magis glabrata, caule 

 fistuloso ; C glabriusculam var. megacephalam aemulans sed pappo 

 duplici, paleis 4 interioribus lanceolatis corollam subtequantibus 4 ex- 

 terioribus brevissimis late cuneato-obovatis vel obcordatis ; ab utraque 

 difFert involucri squamis angustioribus laxioribus, corollis ut videtur 

 carneis, margiiialibus parum ampliatis casteras baud superantibus. 

 (Capitula majora fere pollicaria.) — This, the No. 45 of the col- 

 lection made by Xantus near Fort Tejon, I confounded, as is noted 

 above, with a different species ; but we now have it, in fine state, from 

 Dr. Anderson, who found it near Carson City, in Nevada. 



Var. INTEGRIFOLIA : foliis anguste linearibus integerrimis rariusve 

 1 - 2-lobati3. — Near Fort Tejon, Dr. Van Horn. 



Cii.ENACTis tanacktifolia : humilis, lana tenui canescens, mox 

 glabrata ; foliis plerisque radicalibus bipinnatipai'titis, segmentis lobis- 

 que confertis parvis oblongis sen ovalibus obtusissimis ; caiilibus 

 scapisve (3 - 4-ponicaribus) raonocephalis ; involucri squaruis liiieari- 



