147 



51. Madaria corymbosa, /)C. 57. Arctostaphylos glauca, Xmrf^. 



52. Achillea ^lillefolium, L. 58. CoUiusia bicolor, Btnih. 



53. Senecio Douglasii, DC. 59. " " var. parviflora. 



54. Sonchiis asper, Vill. 60. Scropliularia nodosa, L. 



55. Calais lineainfolia, i)C. 61. Pentstemon centranthifolius, ^Bcnf^. 



56. Macrorhynchus grandiflorus, Nuit. fol. latioribus- 



62. Pentstemon breviflorus, Lindl. var. Shrubby ; lower 

 leaves short (half an inch or less in length,) oblong or some- 

 what obovate, very obtuse; sepals glandularvillous (as they 

 are, less conspicuously, in Douglas's specimens) ; corolla strong- 

 ly bearded, especially at the summit of the lobes, with long and 

 glandular hairs. The expression " labio superiore villoso " does 

 not adequately express it. 



63. Pentstemon ternatus {Torr, in Mex. Bound. Surv.) 

 glaber, basi fruticosus ; caulibus floridis ramisve virgatis simpli- 

 cissimis glaucis ; foliis ternato-verticillatis lineari-lanceolatis (pol- 

 licaribus) utrinque acutis subsessilibus rigidis cartilagineo-serratis 

 denticulatisve, floralibus subulatis ; panicula angustata ; calyce 

 (segmentis lanceolato-ovatis) pedicellisque glanduloso-puberis ; 

 corolla (purpurea ? extus pruinoso-puberula) longe cylindrica, 

 limbo brevi, labiis cequilongis, superiore oblongo erecto apice 

 bifido, inferiore tripartito, segmentis patentibus anguste oblongis ; 

 filamento sterili corolla dimidio breviore hinc valde barbato. — 

 Stems or simple branches slender, one or two feet long, lefty to 

 the inflorescence, the leaves about the length of the internodes. 

 Flowers in a virgate panicle. Tube of the corolla an inch long, 

 only two lines in diameter, scarcely amphate at the summit, the 

 lobes and upper lip only three lines long. Fertile filaments 

 glabrous except at their base, where they are sparsely hirsute ; 

 anthers scarcely exserted, glabrous ; sterile filament very strongly 

 bearded on the posterior side for its whole length. A very dis- 

 tinct species of Bentham's section Elmigera ; the leaves in threes 

 in all the specimens. 



64. Pentstemoii l^tus (sp. nov.) \ pallidus, puberulus, 

 superne gla'ndulosus ; caulibus subpedalibus adscendentibus ; 

 foliis integerrimis crassiusculis, inferioribus spatulatis seu oblan- 

 ceolatis in petiolum marginatum attenuatis, superioribus oblongo- 

 lanceolatis basi lata arete sessilibus, floralibus parvis ; panicula 

 laxa ; pedunculis s^pius trifloris ; calycis segmentis oblongis 

 herbaceis immarginatis ; corolla coerulea superne campanulato- 



