OREENMAN. — CENTRAL AMERICAN SPERMATOPHYTES. 41 



reticulated veins : heads 10 to 12 rum. high, about 3 cm. in diameter, 

 termiuating the stem and branches in a j)auicuhite cyme : involucre 

 campanulate, 3-4-seriate ; bracts of the involucre lanceolate, acute, 

 herbaceous-tipped and more or less S(j[uarrose, externally hispid-pubescent, 

 ciliate : ray-llowcrs orange-yellow, 12 to 14: disk-flowers numerous; 

 pappus of two caducous aristae with minute intermediate scales : achenes 

 somewhat compressed laterally, oblique, 2 to 2.5 mm. long, black, 

 glabrous. — Mi:xico. State of Morelos : near Cueruavaca, 12 November, 

 1902, C. G. Pringle, no. 11,295 (hb. Gr.). 



The rather strongly compressed achenes of the species here described 

 suggests at first a generic affinity with Encella, but the whole habit of 

 the plant is that of a Viguiera ; and, moreover, its specific relationship 

 seems to be with V. Pahneri, Gray, and V. ui-ticiformis, Hemsl. From 

 both of these species V. 7noreIensis differs in having alternate leaves, and 

 in having somewhat sqnarrose but not attenuated involucral bracts. 



Perymenium ( ? ) calvum, n. sp. An herbaceous perennial : stems 

 erect from a ligneous base, slender, about 1.5 dm. high, upwardly 

 strigillose, purplish : leaves opposite, sessile, broadly ovate to ovate- 

 lanceolate, 1.5 to 2.5 cm. long, 0.8 to 1.6 cm. broad, mucronate-acute, 

 shallowly dentate, appressed-hispidulous on both surfaces, slightly paler 

 beneath : peduncles long and slender, 6 to 9 cm. in length, appressed- 

 hispidulous : heads about 1 cm. high, radiate : involucre 2-seriate ; bracts 

 of the involucre oblong-lanceolate, 8 to 9 mm. long, somewhat acuminate, 

 acute, strigillose : ray-flowers 5 to 7, fertile ; rays yellow : disk-flowers 

 several : achenes of both ray- and disk-flowers bald, glabrous, those of the 

 disk laterally compressed and sub-4-angled. — Mexico. State of 

 Sinaloa : in the foothills of the Sierra Madre, near Colomas, 14 July, 

 1897, Dr. J. N. Rose, no. 3225 (hb. Gr., and hb. U. S. Nat. Mus.). 

 Notwithstanding the lack of pappus the plant here described is placed for 

 the present at least in the genus Perymenium. In general habit it 

 resembles P. teneUinn, Gray. 



Helianthella iostephanoides, n. sp. An herbaceous perennial : 

 stems 5 to 7 dm. higli, erect, simple below, branched above, striate, 

 reddish-brown, hirsute-pubescent with spreading or subappressed usually 

 jointed hairs : leaves chiefly basal, oblong to lance-oblong,! to 1.5 cm. 

 long, 2 to 4 cm. broad, obtuse or acute, remotely denticulate, slightly 

 sinuate, narrowed below into a winged petiole, sparingly hirsute-pubescent 

 on both surfaces, subtrinerviate from near the base; stem-leaves few, 

 remote and smaller : heads few, 1.5 cm. high, including the rays 3.5 to 

 4 cm. in diameter, disposed on long bractless pubescent peduncles 8 to 18 



