Nov., 1912. Diagnoses op Spermatocytes Greenman 345 



Eupatorium crassirameum Rob. Proc. Am. Acad. xxxv. 332 (1900). 



This very interesting and unique species has been collected at the 

 following stations. Mexico. State of Oaxaca: Estacion de Almolo- 

 yas, altitude 800 m., 3 March, 1907, C. Conzatti, no. 1753 (hb. Field 

 Museum). Salvador. Above Izalco, altitude 800 m., 25 February, 

 1907, H. Pittier, no. 1978 (hb. U. S. Nat. Museum, and hb. Field Mu- 

 seum) . 



Xanthocephalum linearifolium (DC.) Greenman, comb. nov. X. 

 Alamani Benth. & Hook. f. Gen. PI. ii. 249 (1876); Hemsl. Biol. 

 Cent. Am. Bot. ii. 109 (1881). Gutierrezia Alamani Gray PI. Wr. 

 i. 91 (1852). Keerlia linearifolia DC. Prodr. v. 310 (1836). 



Melampodium villicaule Greenman, sp. nov. 



Herba annua erecta 2.5-3 dm. alta; caule ramoso dense villoso- 

 pubescenti; foliis oppositis petiolatis vel superioribus subsessilibus 

 ovatis vel ovato-oblongis 2-6 cm. longis 1-3.5 cm - latis acutis vel 

 obtusis et submucronatis integris basi abrupte cuneatis 3-nervatis 

 atroviridibus utrinque sparse plus minusve adpresso-tuberculato- 

 hirsutis; petiolo 1 cm. vel minus longo; pedunculis filiformibus 2-8 cm. 

 longis pubescentibus ; capitulis 7-10 mm. diametro; involucri squamis 

 exterioribus 5 ovatis 4-5 mm. longis acutis subadpresso-villosis her- 

 baceis ; flosculis liguliferis plerumque 5, ligulis late ovatis circiter 5 mm. 

 longis flavis; fructu (achsenio squama involucri interiore amplexo) 

 a latere compresso et tuberculato apice in cornu longissimum cir- 

 cinato-revolutum glabrum vel nonnihil sericeum producto. Collected 

 in Mexico, by C. R. Orcutt, no. 4386 (hb. Field Museum, cat. no. 

 282534). 



This species is most nearly related to Melampodium longipilum Rob. 

 but differs in having a less branched stem, broader leaves which are 

 abruptly contracted below the middle to a petiolate base, longer ped- 

 uncles, and fewer heads. 



Sanvitaliopsis Liebmannii Schz. Bip. Leopoldina xxiii. 89 (1887); 



Greenm. Proc. Am. Acad. xli. 261 (1905). 



So far as known to the writer no collection of this apparently 

 rare species has been made since it was discovered in the early 

 forties by Liebmann along the Rio Taba in southern Mexico. Ex- 

 cellent specimens were obtained by Professor C. Conzatti on the Cerro 

 San Antonio de la Cal, altitude 1600 m., State of Oaxaca, Mexico, 

 18 August, 1907, no. 1952 (hb. Field Museum), which were taken 

 to represent the above species and accordingly were sent to the 

 Gray Herbarium for comparison with authentic material. Professor 



