326 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Stevia arachnoidea. Stem, branches of inflorescence, &c., at first 

 white-lanate, soon arachnoid, and at length merely glandular-puberulent : 

 leaves opposite, lance-oblong, acute, cuneate at the base to a very short 

 petiole, pinnately veined, 8 cm. or more in length, dentate, puberuleut 

 above, much paler and tomeutose beneath : inflorescence a round-topped 

 dense compound corymb, its branches mostly alternate, spreading at a 

 considerable angle and often exceeded by the long narrow linear subtend- 

 ing bracts ; heads slender, crowded ; involucral bracts puberulent, acute, 

 6 mm. long: corollas pubescent, 5 mm. long, the tube purplish, the iJmb 

 white or at least pale : achenes black, glabrous : pappus of several 

 short unequal acute scales, without long awns. — *S'. cornpacta, Coult. 

 in J. D. Smith, Enum, PI. Guat. ii. 33, not Benth. — Collected 

 by Mr. J. Donnell Smith on the Volcano of Agua, Department 

 Zacatepequez, altitude 2,700 m., April, 1890, no. 2327. Type in herb. 

 Gray. S. compacta, Benth. PI. Hartw. 197, must from description 

 have been a very different plant with ovate leaves a tliird to half as long 

 and involucres also much smaller. Schultz Bipontinus (Linnaea, xxv. 279) 

 regarded Bentham's species as probably a form of S. rhombifolia, HBK. 



S. AsCHENBORNiANA, Sch. Bip. Linnaea, xxv. 2G9 (1852). Mr. 

 J. M. Greenman informs me that his .S'. diffusa, Proc. Am. Acad, xxxii. 

 307 (1897), proves on comparison with authentic material at the Eoyal 

 Botanical Museum in Berlin to be identical wiih S. Jschenborniana. 



S. bicrenata, Klatt, Engl. Jahrb. viii. 32, was founded upon a poorly 

 developed specimen of *S'. elatior^ HBK. 



S. elatior, HBK., var. decumbens, Rob. & Greenman, Am. Jour. Sci. 

 1. 152., later published as S. decumbens, Greene, Pittonia, iii. 32, is S. 

 Liebmannii, Sch. Bip. in Klatt, Leopoldina, xx. 75. 



S. MADRENSis, Gray, Proc. Am. Acad. xxi. 382, should, I believe, be 

 reduced to S. Plummerae, Gray. There seem to be no differences of 

 moment. 



S. MONARDAEFOLiA, HBK., var. amblyolepis. Leaves large and 

 very thin, the blade somewhat deltoid-lanceolate or ovate, rather 

 abruptly contracted at the base : scales of the involucre obtuse or 

 rounded at the apex. — Collected by E. A. Goldman, at Pinal, 

 Chihuahua, Mexico, altitude about 1,800 m., 19 September, 1898, no. 

 116. 



S. MONARDAEFOLIA, HBK., var. macrophylla. Leaves rhombic- 

 ovate, 1.2 dm. long, 5 to 6 cm. broad, cuneately decurrent upon the 

 petioles 3 cm. or more in length : involucral bracts acute. — Collected 

 by C. G. Pringle, woods of Eslava, Valley of Mexico, Federal District, 



