641 



pr 7:7_. 



Z* SCABBA P 4:317. 111. 



Z^ Serotina P 4:315. La. 



Z,. SPZCATA P 4:315. 



Z.. VZTTATA P 4:315. Miss. 



Genus LtACTUCA Linnaeus. 

 Syst ed 1 (1735). A l:289d. 

 IM. CAMPESTBIS P 4:37. 

 Z*. CAlTAZtEXSIS L, Syst ed 10 



B 1:619. Z 2:232. 



L. INTEGRIFOLIA Bigel, Fl Bost ed 2 



287. ^(Nutt Gen 2:124 is pulchella fide B 



It*. LEUCOPHOEA G 19:73. B 1:442. Z 



2:232. =alpina fide IK. 



Zt. MOBSSZZ P 4:38. 



Z.. PULCHELiA DC 7:134. B 1:442 



I^ACTUCA SCARIOLA L. 



Sp PI ed 2, 1119. A l:252d. Z 2:77. 





HI 



not bracted: ex-lobes equal, spinescent- 

 tipped tube with scarious spaces be- 

 tween the angles and eventually split- 

 ting to base, as into 5 distinct sep, the 

 disrupted members then almost rotate- 

 spreading: cor usually bilabiate and sta 

 declined-incurved: cap strongly and even 

 almost sharply triquetrous, many-seeded- 

 sd < mucilaginous when wetted." P 3:30 

 *Cor bilabiate; sta declined . 

 Z.. MATTHEWSn P 3:30 based on Loe- 



Zi. SCEOTTZZ P 3:30, t>ased on Navar- 

 eetia S. Ut. Son. CD. 



Z.. 3ETOSZSSZMA P 3:13, 30, based on 

 Navarretia s (Gilia S of G). 



One-2' hi, at length forming a depres- 

 sed tuft, cinereous-pubescent or gla- 



-"->: lower Ivs linear and slightly 



Genus L.AGOPHYL.LA Nnttall. 



lated apex, more or less incised, all the 

 teeth or lobes and here and there even 



the back, completely enclosing its ob- 

 rompressed ak and decid with it: rays 

 cuneate, palmately 3-cleft, their ak ooo- 

 vate-oblong, smooth, nearly straight, 

 pointless: receptacle flat; chaff a single 

 row of distinct bracts surroundng about 

 5 perfect but sterile disk-fls: pap o. 

 Zi. ZtlCHQlCMA Bth 317. B 1:367. 

 Z,. PZLIPES G, Pac Ry R 4:109. B 1:367. 

 Z.. MIT* IMA K 5:53. Cur 1:40, "proo- 

 ably depauperate L. ramosissima. B 1: 

 376s. 



Z.. &AMOSISSZMA Nutt, Am phi! 

 n sr, 7:390 (1841). Cov 133. Ab 42-1. 

 B 1:367. 



SD Co! Wash,; Idaho; Nevada. 



Canescent with a loose silky pubes- 

 cence, 2-S dm hi, diffusely paniculate: 

 lowest Ivs spatulate-obovate, stm-lvs 

 lanceolate to linear, all entire: hds 6 

 mm hi, 12 mm broad, including the ex- 

 panded rays; ak 3 mm ig. 



Type locality: "in the prairies near 

 Walla-Walla, in Oregon." 

 Z^AGOTHAMKUS Nutt, Am phil sc tr, 

 ns, 7:416 (1841;. nTetradymia fide IK. 

 L, AMBIGUUS Nutt Ic 417. B 1:407 as 

 T: spinosa. 



L. M1CRGPHYLLUS Nutt Ic 416. B 1: 

 407 as T: spinosa. 



IA Moeiu-h. Meth 201 (1794). 

 Moench Ic B 2:2j9. Da 19. Ab 



Srhnttii T Rnt A/TPV PI i*; 

 T, Bot Mex B 145 



Slender, vllous or hirsute, rigid and 5* m . any 7 , f th< ; lowe F in , P airs: ex- 



brittle, paniculately branched ann. with I b JL s SSMSlJ r etrose-tipped: cor p or 



mostly alt com entire Ivs, and many f' 18 ^ 6 "?" S : c e Tl Mo^e rn -Tl?" 



sm hds of pale salmon or y vespertine eac cel1 " Mohave - CD > Ut - 



-,, Gen ed 1, 185. P 4:46. 



Z.. CAMABA L, sp pi 627. Baja. 

 LAPEAMZA G, PI Wright 1:99 t 9 

 (1852). 



Z.APFT7I.A Moench, Meth 416 (1794). = 



Echinosper- 

 mum Lehm, fide IK. 

 L. CALIFORNICA Par 307. 

 L. CENCHROIDES P 4:96. 

 L. COLLINA P 4:96. 

 L. DESERTORUM P 4:95. 

 L. FREMONTII P 4:96. 

 L. HETEROSPERMA P 4:94. 

 L. MONTANA P 4:!)6. 

 L. NERVOSA Par 307. 

 L. OCCIDENTAL! S P 4:97. 

 L. REDOWSKII P 4:97. 

 L. TEX ANA P 4:94. 

 L,. \TM"TINA Par 307. 



IiABIZ Tourn ex Adans Fam 2:480 

 1763). 



Z,. Z,-S-AZ,Z,ZZ Parl. J bot 1:35. B 2:112. 

 If. OCCZDENTAZ.ZS Nutt Sylv 2:199. B 

 2:112. 



GenUM L.ARREA Cav. 



LARREA MEXICANA Moric. 

 1 Nouv Am 71 (1833-46). B 1:92. Par 



Creosote bush of the desert regions; 

 Greasewood. Gobernadora or Hideondo. 



Kern Co to Magdalena bay, Baja 

 (Bryant). Texas. Mohave (Or 1419). 

 CD. 



Larrea glutinosa E, Wisliz R (1848). 

 Zygophyllum tridentatum DC 1:706 

 (1824). 



Type locality: "in regno Mexicano." 

 Larrea tridentata Cov. 75. 

 Zygophyllum Calif ornicum Torr & Frem. 



Tourn ex L syst, ed 1 (1735). 

 Z,. AMPZ.EXICAUZ.E L, sp pi 579. B 1: 

 590. 

 laANGLOISIA Greene. 



"Rigid diffusely branched and low 

 ann: Ivs pinnately divided, but only ter- 

 minal seg of herbaceous and If-like de- 

 velopment, this mostly cuneiform, or 

 linear, with dilated and 3-toothed tip; 

 pinnae in several pairs, but mostly re- 

 duced to a Ig w bristle or tuft of bris- 

 tles: fls few or solitary in axils of Ivs, 



Genu* I.ASTARRJAEA Remy. 



Sm diffuse rigid fragile an, with as- 



