Tap. 7055. 
PENTSTEMON koronptrotivs. 
Native of North Mexico. | 
Nat. Ord. ScropHULARINEZ.—Tribe CHELONE. 
Genus Pentstemon, Mitchell; (Benth. et Hook. f. Gen. Pl. vol. ii. p. 940.) 
Pentstemon (Genuini) rotundifolius ; glaucus, caule gracili elongato foliisque 
glaberrimis,’ foliis inferioribus petiolatis ovato-rotundatis obtusis supe- 
rioribus sessilibus late ovato-cordatis, floribus pendulis longe gracile pedi- 
cellatis in paniculas amplas laxifloras dispositis, sepalis late ovatis obtusis, 
corolla tubuloso-infundibulari 1} poll. longa pilosa aurantiaco-rubra, 
lobis ovato-rotundatis apiculatis, filamentis glaberrimis, staminodio fili- 
formi clavellato glaberrimo. 
P.' rotundifolius, A. Gray in Proc, Amer. Acad. vol. xxii. p. 307; Dewar in 
Gard. Chron. 1888, vol. ii. p. 264, fig. 31; S. Watson in Garden and Forest, 
vol. i. p. 472, f. 73. 
P. votundifolius is stated by its founder, A. Gray, but 
doubtingly, to be a member of the group of the genus 
which contains P. centranthifolius, Benth., of California, 
figured in this work at Tab. 5142; but from which it 
differs notably in habit, in the sparingly leafy stem, and 
above all in the inflorescence, which in P. centranthifolius 
forms a long narrow bracteate thyrsus. They agree 
closely, however, in floral characters, in the naked stamens, 
the coriaceous foliage, slender staminode, and in the de- 
hiscence of the anthers, the cells of which are confluent at ¢ 
the apex. P. rotwndifolius is a native of the Chihahua 
province of Northern Mexico, a wild inhospitable country, 
infested by hostile Indians, traversed by a branch of the 
Rocky Mountains, and only lately explored, botanically and 
geographically. This country has yielded a rich harvest of 
fine plants, including a peculiar species of Pime (P. chiha- 
huwana, Engelm.), and large collections have been formed 
there by C. G. Pringle, which engaged the attention of 
‘Dr. Gray during the later years of his laborious life, and 
are described in his Sertum Chihahuense, published in the 
Proceedings of the American Academy of Sciences (vols. xxl. 
and xxii.). Amongst these is the subject of this plate, 
May Ist, 1889. 
