108 



culate) decurrent from the broadly cuneate base along the pet- 

 iole and slightly down the stem ; petioles about half an inch 

 in length or one-third the lamina, scabrous above and below, 

 with short slightly appressed aculeate hairs springing from mi- 

 nutely elevated or tuburcular bases ; peduncles long, mostly 

 naked, terminated by a single head, arranged in umbeloid- 

 corymbs, consisting of three, four or more ; involucre in out- 

 line broadly campanulate, loosely imbricated in three unequal 

 series, the two exterior foliaceous, subspatulate, obtuse, re- 

 curved, five to nine nerved, the lowest series short and almost 

 entirely herbaceous, the inner series similar to the disk chaff, 

 lance-linear, mostly with sparsely ciliate margins at the base. 



Flowers orange yellow ; rays, five to thirteen, narrowly ligu- 

 late, two to three-toothed (under the glass) claw-sparsely hir- 

 sute, (subglabrous ?) neutral, seven to nine-nerved ; achenia a 

 mere rudiment, linear, glabrous, subthree-sided, awnless, umbil- 

 icus peltate ; disk florets yellowish, short proper tube, filiform 

 with a bulboid expansion at the base, limb five-toothed, teeth 

 somewhat erect, acute, glabrous, externally minutely pappil- 

 lose, bearded within. 



Style tortuous or somewhat twining, glabrous with a smooth 

 bulbous base ; branches of the style exsert linear, recurved, 

 minutely aculeate scabrous on the back, appendages short, sub- 

 ulate, hirsute. 



Anthers dark brown, appendages lanceolate (see fig. 5). 



Fertile achenia turbinate, compressed, four- 

 angled, subwinged above, chiefly on the outer 

 angle or margin, contracted at the incurved base 

 as if shortly stipitate, (as seen at fig. 4, but which 

 does not represent its true winged character as 

 well as the more accurate marginal fig. 7). The 

 point of attachment peltate, or point of articula- 

 tion raised above the ovary ; the stout persistent 

 awns upwardly scabrous ; middle or intermedi- 

 ate ridjje prominent, very hirsute along the an- 

 gles and separately so throughout. The numer- 

 ous sterile disk achenia flat, linear, cuniform, mar- 

 gined by the decurrent awns, which are somewhat 

 longer, equal, scarcely shorter than the florets. 

 Receptacle convex, alveolate, alveoli hispid, disk chafly, chaff 

 membranaceous, three to fi.e-nervcd, conduplicate, nearly clasp- 

 ing: the floret and achenia, linear-lanceolate slenderly acute, 

 very minutely mucronulate-serrulate on the waved margins of 

 the apex, sparsely hirsute, on the back rigid and brittle. 



