94 PROCEEDINGS OF TEE AMERICAN ACADEMY 



longiore ; lal>ii inferioris trisecti lobis 3 fere conformibus obovatis iis 

 labii superioris bifidi minoribus ; ovarii loculis 3— 4-ovulatis. — Collin- 

 sia grandiflora Hook. Kew. Jour. Bot. 3, p. 298, non Lindl. Willow 

 thickets of the Valley of the Kooskooskee, in the western part of 

 Idaho, Spalding, Geyer. The sessile gland representing the fifth 

 stamen is at the very base of the corolla ; in the preceding species it is 

 higher up on the tube and smaller. 



Pentstemon barbatds Nutt., var. trichaxder. Ilumilior e 

 caudice lignescente ; antheris longe parceque laiioso-barbatis ! — S. 

 AV. Colorado, T. S. Brandegee, in Hayden's Exploration, 1875. Mr. 

 Brandegee was struck with this as different from P. harbatus in its 

 growth and aspect ; but I see no character to distingu'sh it from the 

 var. Torreyi of that variable species, except the long hairs on the an- 

 thers, and sometimes a few on the filaments. This has not been else- 

 where met with in the Elmigera section. But it occurs witli such 

 variability and apparent inconstancy in P. glaher and some allied 

 species, that it may not be relied on here. 



Pentstemon Clevelandi. P. spectabiU quoad folia et inflorescen- 

 tiam baud dissimilis ; foliis superioribus arete sessilibus nee connatis, 

 floralibus minimis ; thyrso racemiformi nudo floribundo ; pedicellis 

 breviter filiformibus ; calycis parvi lobis ovatis capsulam 3-4-plo bi'evi- 

 oribus ; corolla sanguinea tuhuloso-infundibuliformi (fere pollicari), 

 fauce paullo ampliata, lobis brevibus rotundatis patentibus ; filameuto 

 sterili apice dilatato hinc barbato. — Cailon Tantillas iu Lower Cali- 

 fornia, received from D. Cleveland in flower, and later from Dr. 

 Palmer in fruit. 



MIMULUS Linn. Having had occasion to elaborate tlie species 

 belonging to the Califoniiau flora, I have thought it best to give a 

 synoptical view of all the known North American Mifpuli. Some are 

 difllicult to limit, and the extent of the genus was also uncertain. 

 There are three or four groups of species, which would necessarily 

 rank as genera distinct from true Minuihis, if they were not connected 

 by transitions. Perhaps the most markeil of these is represented by 

 two dwarf Californian annuals with long filiform tube to the corolla, 

 and a cartilaginous capsule, the valves of which bear the half-septa 

 and placentae. One of them was probably the type of the genus 

 Jiunaiius Benth. in DC. But the tube shortens and broadens in a 

 long series of species, which at length pass into true Mimidiis, in 

 which the placenta sometimes partially and rarely completely divides. 

 Equally peculiar iu habit are the shrubl)y species or forms on which 



