i:>i; COMPOSITAE. 



incised, often distinctly 3-lobed, rough, bispidulous and green both sides, 'A 

 to 4 in. long, on petioles Dearly as long; bur % to 1 in. long, thick, pubescenl 

 or glandular between and on the lower pari of the crowded prickles ;in<l bear- 

 ing :ii apes a pair of strong beaks hooked or incurved ;it tip. 



Naturalized weed, oative of the eastern United States, exceedingly abun- 

 danl in low or marshy lands, often covering hundreds of thousands of acres. 

 Flowering in summer and fruiting in autumn. V. K. Chesnul reports thai the 

 Beedlings have been fatal to hogs. 



2. X. spinosum L. Si'ixv Clotbub. Stems puberulent, much branched; 

 leaves lanceolate or ovate-lanceolate, acute or acuminate, 2 or 3-lobed or -cut, 

 or the upper entire, oarrowed nt base into a short petiole, green above, white- 

 pubescenl beneath, 2 to 5 in. long; by the sides of the leaves are borne 

 yellowish 3-pronged spines 1 in. long; corolla pubescent with short rusty hairs; 

 bur narrowly oblong, ' L » in. long, sparsely prickly; beaks inconspicuous, only- 

 one spinose. 



Naturalized European weed, everywhere a common summer tenant of barn- 

 yards and aeglected fields. Suspected of being poisonous to cattle. 



Tribe 9. Inuleae. Everlasting Tribe. 

 67. MICROPUS L. 

 Small floecose-woolly annuals with entire 1 Leaves and scattered several- 

 flowered discoid heads. Bracts of the involucre open, scarious, surrounding the 

 flower-bearing bracts of the receptacle. Bracts of the receptacle conduplicate, 

 tipped with a scarious appendage and almost concealed by the clothing of long 

 loose wool, each one enclosing a pistillate flower; sterile flowers in the center 

 mostly naked. Achenes gibbous, the corolla and style borne laterally, without 

 pappus, remaining enclosed in the eucullate bracts which finally tall away 

 from the receptacle. (Greek micros, small, and pons. foot, in allusion to the 

 soft -woolly heads.) 



Beak like tip to the fruiting bract largely scarious, erect, short 1. M. calif ornicus. 



Beak of the fruiting bract wholly hyaline, in anthesis as long as the body 



2. M. amphibolus, 



1. M. californicus P. & M. Slender, erect, 4 to 8 in. high, commonly 

 branched only at the very summit; leaves linear-oblong, acuminate; receptacle 

 low, with several scale like processes; fruit-bearing bracts I to o", at length 



indurated, the surrounding bracts of the involucre commonly ."> ; these orbicular 

 or ovate. BCarioUB, with a green spot in the center; staminate tlowers about .">. 



the corolla filiform, but expanding somewhat toward the throat. 



Very common on low hills or valley land through the ('oast Ranges and 

 Sacramento and San Joaquin valleys to Southern California. Apr. -May. 



2. M. amphibolus (J ray. Resembling the preceding but the fruiting bracts 

 9 or lo and comparatively thin and soft; receptacle elevated or oblong; 



staminate flowers subtended by linear thin chaff-like bracts and with a pappus 

 of few brist les. 



Walnut Creek. Contra Costa Co.. Brewer. 



68. STYLOCLINE Nutt. 

 bow floecose-woolly annuals with entire leaves and terminal discoid heads in 



small (dusters. Pistillate flowers with filiform corolla, their bracts ovate, boat- 

 shaped, borne on a slender column-like receptacle, with ereel hyaline tip and 

 the conduplicate body loosely enclosing the achene; pappus none, sterile 



flowers few in the (enter, their bracts plane <>r barely concave and their pappus 

 caducous or none. (Greek stulos. a column, and kliue, a bed. on account of the 



form of the receptacle.) 



