OP ARTS AND SCIENCES. 307 



achenii nervis hispldulo-scabris. — Cool slopes of the Mapula Moun- 

 taius, twenty miles south of Chihuahua. 



Senecio Pringlei. S. Parryi peraffinis, pariter viscoso-puberulus, 

 foliosus, subcymoso-pleiocephalus ; radice pereimi ; foliis membraua- 

 ceis (3-5-pollii:aribus) obovatis argute dentatis pinnatifido-incisisque 

 in petiolum alatum basi auriculatum semiamplexicauletn dentaturn con- 

 tractis, superioribus ramealibusque minoribus subpaiiduratis sessilibus > 

 pedunculis setaceo-bracteatis ; iuvolucri semipoliicaris vix calyculati 

 bracteis angustissimis numerosis ; ligulis fere semipollicaribus ; acheuiis 

 strigoso-canescentibus. — Shady places in the Mapula Mouutains. 



PiNAROPAPPUS JUNCEUS. CauUbus gracillimis 2-3-pedalibus su- 

 perne corymboso-ramosis ; ramis monocephalis ; foliis minimis subu- 

 lato-setaceis (radicalia desunt) ; capitulis iis P. rosei dimidio minoribus ; 

 floribus paucioribus. — Majiula Mountains, on grassy slopes. 



Ipomcea Pringlei. Bipedalis e caudice nodoso crasso, glaberrima; 

 caulibus erectis patenti-ramosis ; foliis subsessilibus pinnatipartitis in 

 segmenta 5-7 lineari-filiformia iutegerrima imave bifida ; pedunculis 

 folium superantibus obsolete bibracteatis uuifloris; sepalis rotundatis 

 capsula fere semipoUicari brevioribus ; corolla pur[)urea infundibuli- 

 formi tripollicari ! — Foot-hills of the Santa Eulalia and Mapula Moun- 

 tains, near Chihuahua. A species of the /. stans rather than of the 

 /. capillacea group, very handsome, and well worth bringing into orna- 

 mental cultivation. 



Pentstemon rotundifolius. Species insignis (e grege P. cen- 

 tra7ithifolii'^), glaberrimus, glaucus ; caulibus e basi lignosa aperte 

 ramosis paniculato-plurifloris ; foliis crasso-coriaceis orbiculatis integer- 

 rimis (majoribus sesquipoUicaribus), imis in petiolum subalatum con- 

 tractis, cteteins arete sessilibus, ramealibus parvis, floralibus minimis 

 subcordatis ; pedunculis pedicellisque gracilibus; sepalis ovalibus lin. 

 2 longis ; corolla miniata poUicari tubceformi apice subiEqualiter 5-loba, 

 lobis lato-ovalibus (lin. 2 longis), fauce genitalibusque glabris ; antheris 

 post dehiscentiam explanatis ; capsulis lato-ovatis lin. 2-3 longis pedi- 

 cello arete recurvato pendulis. — Mapula, Potrero, and other moun- 

 tains, near Chihuahua, hanging from seams of cliffs, long-enduring, 

 ajiparently flowering for most of the year. 



CoRDYLANTHUS Wrightit, Gray, in Bot. Mex. Bound. 120, is in 

 the collection, but the corolla is pure yellow. Berhaps it was so in 

 "Wright's and Rothrock's specimens. It should have been stated that 

 the filaments are strongly and unilaterally villous. 



