106 



PLANT^ WRIGHTIAN^. 



VI. 



7:.JC: 



Crepis amiugua, Grmj^ Pl. Fendl. p. 114. On the sides of the Organ Moun- 

 </-^ tains, noitlieast of El Paso; Apiil. (1427.) — The specimens exactly accord with 

 <y those of Fendlcr, cxccpt tliat the Icaves and scape-Iike stems are rather more 



sctose. The plant (undistributed) which I ennmerated under this name in Wrighfs 

 • formcr collection {Pl Wrlght. p. 129) is- very diiFerent, and a true Hieracium, 

 pcrhaps a less shaggy form of H. longipilum. 



ADDENDA. 



Peganum Mexicanum, Grai/, Pl. Wright. p. 30, adn. Sides of the Chiricahui 

 Mountains, Sonora; Sept, in flower and fruit. (1428.) — The stems are numer- 

 ous from a dcep and lignescent root, when old decumbent, attaining 10 or 12 inches 

 in length. Seeds narrowly clavate-oblong, slightly curved, with a closely alveolo- 

 late-reticulatcd testa. Embryo as in P. Harmala, but more slender. — The speci- 

 mens were misplaced and so overlooked at the time of the distribution. 



The following are described from specimens just received by Dr. Torrey, from 

 Dr. Parry of the Mexican Boundary Commission, who collected them last autumn 

 on the Kio Grande below New Mexico. 



Cowania ERiciEFOLiA (^Torr. in litt.): caule ramosissimo ; foliis parvis linearibus 

 margine valde revolutis cuspidatis subtus incanis ; calycis tubo breviter turbinato ; 

 petalis albis. — Creviccs of limestone rocks on the Eio Grande, below Presidio del 

 Norte, Dr. Parry. — " A straggling bush, one or two feet high." Remarkable for 

 its Heath-like leaves, which are only two or three lines long. Flowers smaller than 

 in C. Mexicana. 



Laphamia bisetosa ( Tbrr. in litt.): " pygmaea, suffruticulosa, subviscoso-puberula ; 

 foliis oppositis et altcrnis parvis ovatis vel obovatis in petiolum attenuatis subden- 

 tatis vel integerrimis resinoso-atomiferis punctatis; capitulis solitariis sessilibus 

 6 - 8-floris ; ligulis nullis ; acheniis pubcrulis margine Igevibus ; pappo e setis 2 

 corolla dimidio brevioribus."- — Crevices of rocks in a canon of the Rio Grande, 

 below Presidio del Norte 1 Oct, Dr. Parri}. — Plant many-stemmed from a thickened 

 and ligneous caudex, in the manner of the genus, from one to three inches high. 

 Leaves crowded, barely three lines long, and with a petiole of about two lines in 

 length. Head 3 or 4 lines long, terminating the short branches. CoroIIa 4-toothed. 

 Bristles of the pappus equal, rather stout, minutely scabrous. — This is the second 

 addition which Dr. Parry and Dr. Bigelow have made to this genus. It is the 

 more interesting, ou account of its bisetose pappus and few flowers, as it nariows 

 the interval between the sections Monothrix and Pappothrix. 



Perityle Parryi (sp. nov.) : subviscoso-puberula ; foliis plerisque alternis reni- 

 formi-cordatis crebre dentatis nunc sublobatis ; ligulis lineari-oblongis discum 



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