1848.] 25 



M. *poxoidcs. Panicle narrow, many-floweret?, the spikelets erect; spikelets 

 ■with two flowers perfect, and a small rudiment extending beyond the acute 

 glumes; lower palea 5-iierved. 



Hae. Santa Barbara, Upper California. 



*STENOCHLOA.t 



Splkelctfi about o-flowered ; flowers distichal, hermaphrodite. Glumes 2, awn- 

 less, lanceolate, acute, much exceeding the spikeiet in length, Puhx 2, awn- 

 Jess, the lower concave, ovate, nearly nerveless and pubescent, the upper bicari- 

 nate. Slamina 3. Ovarium stipitate. Stylts 2. Stigmas plumose. Caryupsis 

 free, oblong-lanceolate. 



S. Californica 



Hab. Island of Santa Catalina. 



*PLEO.°OGO]Nr. 



Spikelets 1 flowered. Glumes 2, nnequal, nearly as long as the flower ; the 

 lower with two awns, the upper entire, with one awn. Falea: 2, the lower 

 oblong, with the apex produced into a short awn, the upper without awn and 

 2nerved. Stamens 3. Styles 2. Stigmus pilose, slender.— Culm compressed, 

 somewhat branched ; leaves linear, short and rigid ; spikes terminal, simple, not 

 jointed. 



P. setosun^. 



Hab. Mountains of Santa Fe, Mexico. 



MONARDA. 



M. *peciinata. Biennial? slightly pubescent; leaves oblong-lanceolate, 

 denticulate, shortly petiolate ; capituli proliferous, rather small, subtended by 

 herbaceous bracts, some of them purplish, ovate-acute, strongly ciliated, as weil 

 as the elongated, setaceous teeth of the calyx; corolla widely ringent, the tube 

 scarcely exserted beyond the calyx. 



Hab. Near Santa Fe, New Mexico. 



HEDEOMA. 



H. *ciliala. Perennial ; minutely pubescent, branching much from the 

 base; leaves linear-obtuse, shortly petiolate, entire ; flowers, two or three to- 

 gether in the axills ; calyx hirsute, with long, unequal ciliate teeth; corolla 

 about the length of the calyx. 



Hab. In the Rocky Mountains, towards Santa Fe. 



SISYMBRIUM. 



S. *reflexum. Smooth; leaves somewhat lyrate pinnatifid, the ter- 

 minal lobe toothed, upper leaves nearly entire and denticulate ; flowers small ; 

 petals linear-spathulate, a little longer than the colored calyx ; pods subterete, 

 very long, nearly sessile, rigidly reflected and acuminated with the style. 



Hab. Near St. Pedro, Upper California. 



URTICA. 



U. *holosericea. Perennial and tall; leaves opposite, large, on long peti- 

 oles, cordate-ovate, acute, above lanceolate, coarsely serrated, smooth, beneath 

 silky villous, as well as the stems and petioles, the latter also pilose ; flowers 



tSo called in allusion to its macilent appearance. 



4 



