36 



smaller, narrower and more numerous, with the lateral veins 

 leaving the midrib at a much more acute angle; the small 

 uppermost leaves are narrowly lanceolate, not at all ovate or 

 broad cuneate. The lower stem-leaves are about 95 mm. long 

 and 18 broad, and are sessile, crowded on the stem. There are 

 about 27 florets in a head; the narrow corolla-lobes are about 

 1.7 mm. long. The inflorescence resembles Solidago oreophila, 

 but that has quite different leaves, and larger heads. The stem 

 is like that of S. puberula Nuttall. 



In Rydberg's key (Flora of Rocky Mountains) it runs near- 

 est to S. concinna Nels., a much smaller plant, with pubescent 

 achenes, those of our plant being quite smooth. In Small's key 

 (Flora S. E. States) it goes to 5. lindheimeriana Scheele, which 

 has entire leaves. In Britton and Brown (111. Flora) it will not 

 go satisfactorily anywhere, but the closest resemblance is per- 

 haps to 5. hispida Muhl. In Rydberg's Flora of the Prairies and 

 Plains it clearly falls in the Speciosae, and apparently nearest 

 to S. lindheimeriana. 



In full flower the rather short broad heads have the phyl- 

 laries conspicuously marked with green apically, often to the 

 exclusion of the light margin seen in most species. This gives a 

 spotted effect, as in S. oreophila Rydb. Later, as the heads go 

 to seed, the phyllaries become more elongated, and paler, and 

 for the most part show only a pale suffused green central stripe, 

 more in the manner of 5. concinna Nels. The pattern of the 

 phyllaries in most Solidago consists of a green central stripe, 

 with a variable amount of green extending suffusedly over the 

 apical part, but usually leaving a distinct light margin. 5. mis- 

 souriensis Nutt. is exceptional in that there are two green 

 stripes, separated by a light median stripe. 



Our plant may be a western derivative of 5. puberula 

 Nuttall, with shorter, less acute phyllaries and rough stem. 

 Capulin, where the plant was discovered about August 18, 

 1930, is about 18 miles from the Colorado line, and two or three 

 times that distance from Oklahoma. 



Boulder, Colorado 



