MISCELLANEOUS SPECIFIC TYPES. — V- 227 



sile, narrower below the middle, yet ending abruptly and 

 usually subcordate at base, the apex very acute : bracts of the 

 short racemes small, oval» obtuse, rather strongly ciliate under 

 a lens : corolla extremely short yet apparently mature ; fruit 

 unknown. 



Species very distinct by the foliage ; known only as col- 

 lected by the late Rev. A. B. Langlois, at Covington, Louisi- 

 ana, 16 April, 1894. 



Machaeranthera scoparia. Annual or biennial, less 

 than a foot high, much branched from the base, and fastigi- 

 ately, the slender but rigid branches forming a rather dense 

 broomy-bushy tuft : basal and early leaves unseen, those of 

 the branches linear, entire, acute, ascending, hardly an inch 

 long, subcinereous with a minute and rather dense strigulose 

 pubescence, the branches greener, their scanty pubescence 

 more tomentulose : heads many, at summit of the plant only, 

 some of the main branches 3-parted, with as many heads, 

 others simple and raonocephalous : involucres ¥2 inch high, 

 subcampanulate, their bracts not excessively numerous, the 

 tips appressed and straight, not pungently acute, whitish at 

 the back with a minute villous-tomentose pubescence; rays 

 20 or more, rather short, violet. 



Plant of open grassy woodlands, northwest of Turkey 

 Tanks, on the Coconino Forest Reservation in northern Ari- 

 zona ; the specimens collected by Jardine and Hill, 26 Aug., 

 1911. The species may be compared with my M. linearis of 

 southern New Mexico, from which it differs as well by its 

 much less imbricated involucres, and by its pubescence, as by 

 its low bushy habit. 



Senecio mesadenia. Perennial, the solitary stem stout- 

 ish, erect, 2 feet high, subumbellate-corymbose at the almost 

 naked summit, below the middle very sparsely villous-Ianate : 

 leaves almost all basal, the longest a foot long including the 

 very long petiole, the blade only 4 or 5 inches, the petioles like 

 the stem below villous-Ianate, the blades oval-elliptic, very 



