422 CDMPOSIT.E. Pcrezia. 



Tribe X. :MUT1SIACE/E. 



These are BUahialiJlorce, i. e. liuve thuii norollaa bilabiate, one lii) inostly 3- 

 tootlied, the otlier 2-lobcil or cleft, the lobes or lips revolute. As the flowers am 

 more conuuoiily all pcrloi-t, and the stylo similar, they may bo conibiimled with tho 

 Thistle-tribo, in which tho corolla is olton more or less two-lippeil or irregular. But 

 the lobes of the latter become revolute in the present tribe, and tho receptacle is 

 never clothed with a coat of bristles. — Tho tribe is most laigcly represented iii 

 South America ; oidy one genus reiiches Califorida. 



107. PEREZIA, Lugnsca. 



Head several - many-Uowered ; tho llowcrs all perfect. Involucre turbinate or 

 campanulate ; its scales imbricated, lanceolate or oblong, mostly chartaceous. Recep- 

 tacle Hat and naked. Corolla with slender tube and bilabiate limb ; the outer lip 

 mostly longer and 3-toothed ; the inner 2-toothed or 2-cleft. Anthers Avith long 

 naked tails at base, and a lanceolate terminal appendage. Akenes elongated-oblong, 

 terete or slightly angled, often obscui'ely narrowed at apex, commonly glandular. 

 Pappus of coj»ious scabrous capillary bristles. — Herbs ; with alternate and mostly 

 rigid leaves, and solitary or usually paniculate heads of {)urple or white tlowers. — 

 Gray, PI. Fendl. & PI. Wright. ; Benth. & Hook. Gen. PI. ii. 500. 



A genus of 40 or 50 species, South American and Mexican, and a few within the borders of tho 

 United States. 



1. P. microcephala, Gray, 1. c Two or three feet high, branched and glan- 

 dular-puberulent above, leafy to the top : leaves thin, oblong and the upper ovate, 

 all cordate-clasping, with tlie sinus shallow, minutely glandular-scabrous, coarsely 

 reticulate-veiny, closely .spinulose-deiiticulate : heads copious, corymbose at tho 

 summit of tlii(paiii(;iilal,(! itrauclies : seiiles of the involucre all abruptly very acute, 

 l)uberulejit-glaiidular ; tiio innermost a little shorter than the 10 to 15 rose-puri>lo 

 Howers. — Acourtia microcephala, DC. Prodr. vii. 66. 



Near Monterey (Douglas), Santa Barbaia (Torrei/), and San Diego Co., 7>. Cleveland, Palmer. 

 Involucre 3 or 4 or at lengtli f) lines hi^'li : pappus at maturity lialf an incli long. In tlie siieci- 

 mcns of Douglas, described by De Candolle, the iiowers are immature. 



2. P. Arizonica, Gray. A foot or two high, almost glabrous : leaves more 

 deeply cordatcly or sayittately clasping : heads fewer and rather smaller, in 

 cymose corymbs : scales of the involucre obtuse, pubescent on the edges, otherwise 

 glabrous and not glandular; the innermost only half the length of the 8 to 12 

 white or llesh-colored flowers. — R microcephala, Gray in coll. Parry, Is'o. 141, 

 Am. Nat. ix. 273. 



Arizona, Dr. Palmer. S. Utah, Dr. Parry. Probably also No. 293 of California collection. 

 Coulter. Palmer's plant is said to exhale "an agreeable aroma." 



Tride XI. CICHORIACE/K 



Completely marked by the ligulate and perfect flowers throughout the head : the 



ligules almost always 5-toothed at the apex. Herbs, with a bitter milky juice. 



Lett\ice, Endive (a variety of tho Cichory), and Salsify {Trac/opogon porrifoUus, which is apt to 

 run wild around cultivated grounds), are the common cultivated esculent plants of the tribe, all 

 of the Old World. The tribe consists of oO or 60 genera, even as consolidated by Bentham in the 

 new Genera Plantarum, and is fairly well represented in California. It is so strictly natural that 

 it is ditlicult to divide it into well-hmited natural subtribes or into genera. 



