247 

 Genus ERIGERON Linimeus. 



Branching 1 or scapose herbs, with alt 

 or basal Ivs and corymbose, paniculate 

 or solitary lids of both tubular and 

 radiate fls: inv hemisperic or compan- 

 xilate, its bracts narrow, nearly equal, 

 usually imbricated in but 1 or 2 sr: re- 

 ceptacle nearly flat, usually naked: ray 

 fls p'ish or w'ish, pistillate: disk fls y, 

 tubular, perfect, 5-lobed: sty-append- 

 ages short, mostly rounded or obtuse, 

 ak flattened, mostly 2nerved; pappus 

 bristles scabrous, in 1 sr, or with an 

 outer shorter sr. 

 ERIGERON CANADENSIS Linn. 



Throughout temperate N. A. Baja mts! 

 ERIGERON SANCTARUM S. Watson. 



Santa Inez mts, S Bar Co; Rosa. 

 ERIGERON GLAUCUS Ker. 



Cruz; Rosa; San Miguel Island. 

 ERIGERON PARISHII A. Gray. 



Rocky canyons, Mohave (Parish). 

 ERIGERON FOLIOSUS Nutt. 



Baja mts! S Ber (Parish); Rosa; Ore- 

 Variety STENOPHYLLUS A. Gray. 



Qruz (Greene) ; range of type. 

 Variety TENUISSIMUS A. Gray. 



Hanson's! SD Co! 

 ERIGERON INCOMPTUS A. Gray. 



Baja! SD foothills. 

 ERIGERON PHILADELFHICUS Linn. 



Fla; Texas: SD Co; SBer Co (Parish). 

 ERIGBRON DIVEIRGENS T. & G. 



Nebr; Texas; Washington; Baja (Br). 

 APLOPAPPUS MONACTIS A. Gray. 



Gray, Am ac pr 19:1 (1883). 



Type locality: "borders of the Mo- 

 have Desert," Cal. 



Coville CNH 4:121. 

 MADIA SATIVA Molina. 



Sts simple with a few short ascend- 

 ing branches above, erect, stout, 3-9 

 dm hi, pubescent with slender hairs 

 and beset with stalked very viscid 

 glands; Ivs lanceolate, nearly entire, 

 glandular-pubescent; hds 12 mm hi, 

 short-peduncled or sessile in the upper 

 axils and at the ends of the short 

 branches; cup of receptacle broadly 

 oampanulate, enclosing many disk-fls; 

 disk-ik cuiieate-oblong( 4-angled ray- 

 ak falcate-obovate. 



Abrams, Fl LA 419. 



Genns ACHYRACHAE\A Schauer. 



Soft-pubescent sparingly branched 

 an, with narrow Ivs, all but the lowest 

 alt, and rather large oblong-campanu- 

 'late hds terminating pedunculiform 

 branches: bracts lanceolate, herba- 

 ceous, each enfolding a ray-ak: bracts 

 of the low convex receptacle membran- 

 ous in a single row between ray and 

 disk-fls: ray-fls 6-8, very short, 3 -cleft; 

 their ak slightly obcompressed, desti- 

 tute of pappus: disk-fls mostly fertile, 

 clavate, 10-striate, bearing a showy 

 pappus of 10-elongated-oblong silvery- 

 scarious scales. 

 ACHYRACHAENA MOLLIS Schauer. 



Erect, 24 dm hi; Ivs linear, entire or 

 serrulate; hds 2.5 cm long or less in fl; 

 rays very short and involute, y, chang- 



ing to reddish-brown; hds expanded in 

 fr, forming a globose cluster; pappus 

 becoming very showy. SD! Baja! 



Throughout California; Baja! Cruz. 

 CENTROMADIA PARRYI Greene. 



Widely branching, 3-6 dm hi, sparse- 

 ly hirsute, minutely resinous-glandu- 

 lar, aromatic; lowest Ivs pinnatind, the 

 cauline linear, entire, sharply pungent, 

 spreading, the uppermost pilose-ciliate 

 toward the base; hds scattered; ray-ak 

 dull black, 1.5 mm" long, somewhat 

 compressed, smooth on the sides, with 

 a few coarse tuberculations on the 

 back; disk-ak with 3 or more paleae 

 exceeding the cor; chaff of the recep- 

 tacle not pungent. 



Abrams, Fl LA 421. "Brackish flats 

 toward the coast. Je-Ag." 

 CENTROMADIA PUNGENS Greene. 



Stout with rather rigid ascending 1 or 

 spreading branches, 4-8 dm hi, hirsute 

 or hispid, scarcely viscid, nearly or 

 quite scentless; lower Ivs 2-pinnatinO. 

 upper 1-pinnatifid, the lobes pungent- 

 tipped; chaff of receptacle rigid-pun- 

 gent; disk-ak destitute of pappus; ray- 

 ak nearly black, about 2 mm long, the 

 ventral angle carinate, the plane sides 

 and rounded back faintly tubereulate- 

 rugose. 

 BACCHARIS EMORYI A. Gray. 



Erect with slender branches, 1-5 m 

 hi: lv.s mostly oblong, or the lower 

 broader, with attenuate or cuneate 

 base and the larger somewhat petioled, 

 more or less 3-nerved, often 2-4- 

 toothed, pale; those of the branches 

 obladlceolate-linear, mostly entire, 1- 

 nerveci ; inv campanulate or oblong, 6-8 

 mm long; bracts firm-coriaceous the 

 outermost oval obtusish, the innermost 

 thin, bearded toward the tip; pappus of 

 the pistillate 12 mm long in fr. 



Gray. Bot Mex B S3 (1859). 



Tyne locality: "On the Gila," Ar. 



Coville, CNH 4:127. Resting Springs. 



Abrams, Fl LA 405. 



L A; Arizona; Utah; Nevada; Arizona. 

 BACCHARIS GLUTINOSA Pers. 



Sts herbaceous above, woody below, 

 1-3 m hi: branches striate-angled; Ivs 

 verv glutinous, lanceolate ( acute, den- 

 ticulate or repandodentate, 5-7 cm 

 long; hds in ample cymose panicles at 

 the ends of simple slender branches, 

 mostly 6 mm hi; inv stramineous, des- 

 titute of g center or distinct cpsta. 



Abrams, Fl LA 406. Occasional on 

 borders of marshes. Ag-N. 



Pers, Syn PI 2:425 (1807), 



Type locality: "in R [egni] chilensis 

 ruderatis." 



Coville, CNH 4:127. 



Baja;LA Co;Colo; Texas; Mexico; Chili. 

 BACCHARIS PILULARIS DC. 



Monterey Oregon; Rosa; not SD Co? 



Compactly ' branched evergreen 

 shrub, 2-4 m hi or lower and depressed 

 when growing along the seashore: 

 branchlets angular from the If-bases; 

 Ivs subcoriaceous, glutinous, 2 cm long 

 or less, cuneate-obovate, coarsely 

 toothed or some entire; inv nearly 



