192 PROCEEDINGS OF THE AMERICAN ACADEMY 



in a dense oblong panicle, not secund ; rays small, not surpassing 

 the disk-flowers ; akenes canescently iiubescent. S. sempervirens 

 Gray, Bot. Calif, i. 319, in part. Southern borders of California, 

 collected by Palmer, Cleveland, and Parish. 



S. SEMPERVIRENS, L. Besides the synonyms, S. Mexicana^ L., S. 

 Icevigata^ Ait., and S. ItmonifoUa, Pers., the S. Azorica, Ilochst. in 

 Seubert, Fl. Azorica, is to be added. The indigenous plant is apt 

 to acquire some hirsute jjubesceuce on the inflorescence and the 

 upper part of the stem, and even on some of the leaves, when it 

 grows beyond the influence of salt or brackish water. — Var. viM- 

 INEA, the S. viminea^ Ait., S. integerrima. Mill. Diet., S. integri- 

 folia^ Desf., and S. carinata, Schrader ; these are duller-leaved 

 cultivated forms, with some fine appressed jiubescence on the inflor- 

 escence, evidently the result of prolonged cultivation in European 

 gardens. And S. lithospermifolia, Willd., must be a still more 

 altered state, with larger leaves, these somewhat puberulent. No 

 indigenous specimens like it have been found. 



S. STRICTA, Ait., also of Pursh, not of later authors. S. virgata^ 

 Michx. S. Imoides, Solander, ined. S. genistoides, Bertol. This 

 was an unexpected discovery, which leaves no choice other than the 

 restoration of the original name to the species which was well 

 named *S'. virgata by Michaux. — Inseparable from it is var. angus- 

 TiFOLiA, S. angustifoJia, Ell., which in brackish soil appears to pass 

 into the most slender and narrow-leaved form of S. sempervir-ens. 



S. FLAVOVIRENS, Chapm. Fl. 211. Even this shows indications of 

 passing into a broad-leaved form of S. stricta^ Ait. 



■i- -i- Unicostatce, ogrestes, 



++ Slender, wholly glabrous and smooth, always rayless. 



S. GRACiLLBiA, Torr. & Gray. 



++ ++ Minutely puberulent, obscurely venulose : thyrsoid panicle 

 of small heads not at all secund. 



S. PUBERULA, Nutt. — Var. PULVERULENTA, Chapm., viz. S. puh'e7-u- 

 lenta, Nutt., and S. obovata, Bertoloni. 



++++++ Leaves obscurely veined, with only midrib prominent, 

 mainly entire ; cauline closely sessile : heads small, in a broad 

 panicle of racemiform recurving clusters : rays 3 to 5, rarely 

 none. 



