34 MINNESOTA BOTANICAL STUDIES. 



almost uniform width, and lobed or serrate with spreading 

 teeth ; spikes leafy bracteate, dense, 4 to 6 cm. long, and almost 

 as broad ; calyx i cm. long, obliquely cleft to the base on the 

 lower side, the upper side notched with a shallow rounded 

 sinus ; corolla lemon yellow or faintly purple tinged, slightly 

 over 2 cm. in length, 6 mm. wide, summit of the galea incurved, 

 the tip provided with two cusps. 



The type is our no. 3639, collected June 2, 1897, in a meadow 

 nine miles east of Santa Fe, altitude 8000 feet. The name 

 fluviatilis is not very appropriate, but as specimens have been 

 distributed under this name, I consider it better policy to de- 

 scribe it under the name it has borne, rather than cause con- 

 fusion by assigning another more appropriate one. The speci- 

 mens were growing in a grassy meadow, on the banks of the 

 Santa Fe creek, opposite "Monument Rock." For some 

 months of the year this meadow is overflowed by water from an 

 irrigating ditch, so that then the plants are actually growing in 

 water, as indicated by the name. This species seems to be 

 closely related to the common eastern P. Canadensis. 



Pentstemon caudatus n. sp. 



Glabrous throughout ; stems herbaceous, rather stout and 

 fleshy, simple, erect, 25 to 30 cm. high, pruinose, leafy through- 

 out ; leaves all sessile, more or less clasping, pruinose, rather 

 fleshy, margined with a narrow pale line, the lower ones spat- 

 ulate-oblong, or oblong-lanceolate, moderately acute, 4 to 7 

 cm. long, 5 mm. to r cm. wide, gradually becoming longer and 

 broader until the inflorescence is reached, where they are 

 broadly ovate- lanceolate, with long and narrow tips ; beginning 

 with the inflorescence they become gradually shorter, but still 

 retain the broad base, until near the very end of the stalk, where 

 they are reduced to lanceolate bracts : flowers pale violet or 

 pinkish, numerous in thyrsiform close clusters in the axes of the 

 leaves, occupying from one-half to three-fourths of the length 

 of the stem : calyx about 5 mm. long, its lobes lanceolate, or 

 ovate-lanceolate, long-pointed, scarious margined, broadly so 

 near the base; corolla slightly over 2 cm. in length, the tube 

 gradually dilated into the funnelform throat, the orbicular-obo- 

 vate lobes nearly equal, about 7 mm. long, spreading; sterile 

 filament bearded in the upper half on one side, the tip some- 

 what dilated and curled ; anthers dehiscent from base to apex, 

 puberulous at line of dehiscence. 



