THE THISTLE FAMILY. 5,9 



in fact, grows to a great height, sometimes tiiat of twelve feci. It is unusu- 

 ally rich in resin. 



S. aster isciis, starry rosin-weed, one of the most showy of the jr^ntjs. 

 bears heads of Howers that at a glance suggest some one of ihc co: - 



and the bright yellow of which can be seen in open woodlands from 1 



and Louisiana to Maryland. The ovate-lanceolate leaves arc alternate. 



nearly sessile, entire or dentate, and the plant is, morefx--'- « i-'- - 



bescent. 



S.pcrfoli'dfinn, Indian-cup or cup-plant, may be known Ijy iLsM^u.. 

 and by its leaves that are united, about the stem, at their bases. 1 

 flowers are very numerous and are toothed at their summits. Through our 

 range, from Louisiana and Georgia northward, it occurs by streams in icunv 

 soil. 



CHRYSOGONUM. 



C/i ?'ysogo?i u >n Vi? \i^/n i\ \ n u m . 



FAMILY COLOUR ODOUR RANGE TIME OF BLOOM 



Thistle. Bright yelloiv. Scentless. Florida to rennsylvania. Iilru.try.lu.y. 



Floivcr-hcads : showy, solitary and terminal at the ends of erect scapes, covered 

 closely as the involucre with silky, white hairs. luvoliicre : canipanulatc, its 

 bracts imbricated in two rows of five each ; the outer ones oblong and obiusc ; 

 the inner ones inconsi)icuous and subtending the jMstillatc ray flowers. A'liys : 

 mostly five-notched at their summits. Tulnilar jlcmiers : five-toolhcd at the apices. 

 Leaves : from the base, oval, or ovate, mostly bhmt at the apex and tapering at the 

 base into long silky petioles ; crenate; covered on both surfaces with lustrous 

 white hairs. A perennial herb reproducing itself by runners. 



Extremely pretty are these small blossoms as, star-like, they peep out from 

 among the grasses. When well grown, the plant often loses its simple 

 habit and becomes considerably branched. It also reproduces itself by 

 stolons, or runners, somewhat after the custom of some violets. It repre- 

 sents a monotypic genus. 



GREEN=HEADED CONE-FLOWER. 



Riidbcckia Iiu //i/iifa. 



FAMILY COLOUR ODOUR RANGE TIME OF BLOOM 



Thistle. Yellow. Scentless. Floriila to Quebec and Wfstuuirii. Julys. 



Flowe7'-hcads : large ; showy, composed of botli ray and disk flowers. //;. 

 with unequal bracts. Kays : six to ten, large, one to two inches long, yellow, 

 drooping. Disk fl^nvers': greenish yellow, forming a cone. /-^«/7r/ ; alternate, 

 the lower ones long petioled ; very large ; pinnately three to seven divided into 

 broadly oblong-lanceolate, or obovate segments which arc toothed and lol)cd, the 

 terminal one being mostly three to five-parted. Upper harfs : ovate, not divided. 

 toothed, or entire; thin; minutely pubescent. Stem: four to twelve feet high; 

 branching ; smooth. 



