OF ARTS AND SCIENCES. 319 



8. P. GLANDULOSA Nutt. PL Gamb. Viscido-pubescens, glaiidu- 

 losa, vix liirsuta; foliis bipinnatipartitis, lobis crebris parvis ; calycis 

 lobis oblongis spathulatisve ; reti seminura laevi. — P. Popei Torr. & 

 Gray, Pac. R. R. Exp. 2, p. 122, t. 10 : forma minus pubescens, corollae 

 lobis integerrimis. " Eutoca glandulosa Nutt.," Hook. Kew Jour. 3, 

 p. 293. 



Var. Neo-Mf.xicana: coroUtE lobis aut tenuiter aut iusigniter 

 eroso-denticulatis. — P. Neo-Mexicana, Tliurber iu Bot. Mex. Bouud. 

 p. 143. 



9. P. CONGESTA Hook. Pubescens, sgepius ciiierea, fere eglandu- 

 losa ; foliis 3-7-sectis partitisve, segmentis paucis parvis inter majora 

 oblonga seu ovalia inciso-lobata positis, infimis petiolatis, summis con- 

 fluentibus ; calycis lobis fere liuearibus ; stylo semibifido ; seraiuibus 

 reticulato-scabris. — P. tanacetifolia A. DC, quoad pi. Tex. Berland. 

 — This species inhabits Texas; the following, California. 



++ ++ Calyces setoso-hispidi vel ciliati, capsulam longius superantes, 

 lobis sajpe inajqualibus : stylus bipartitus: seminum testa aiveolata, 

 reti incrassato demum subrugosa. 



= Genitalia exserta : folia pleraque 1-2-pinnatisecta. 



10. P. TANACETIFOLIA Beuth. Erccta, hispida vel hirsuta, haud 

 vel superne parum glandidosa ; foliis 9-1 7-sectis, segmentis 1-2-pin- 

 natipartitis sessilibus, lobis sajpius lineari-oblougis ; spicis elongandis ; 

 calycis lobis linearibus seu lineari-spathulatis capsula ellipsoidea vix 

 duplo longioribus ; genitalibus maxime exsertis. — California, chiefly 

 towards the coast. 



11. P. KAMOSissiMA Dougl. Divergenti-ramosa, superne glandu- 

 losa et viscida ; foliis 5-9-sectis vel partitis. segmentis saepius oblongis 

 pinnatifido-incisis ; spicis glomeratis vix elongandis, pedicellis demum 

 horizontalibus ; genitalibus modice exsertis ; calycis lobis linearibus 

 spathulatisve capsula globosa vel subovata 3-4-plo longioribus. — 

 California, and through the dry interior region from Arizona to 

 "Washington Territory. Passing apparently into the preceding and 

 the following. 



Var. HISPIDA. Setis longis albis barbata, saltern in calycis lobis 

 elongatis (fructif. lin. 4-6 longis) ; spicis fructiferis apertis racemifor- 

 mibus ; foliis minus sectis. — Santa Barbara to San Diego, California. 



= = Genitalia corolla rotato-campaaulata haud longiora : spicie laxi- 



uscula3. 



11. P. CILIATA Benth. This resembles depauperate forms of the 

 two preceding ; but the spikes are simple or merely geminate, and at 



