1848.] 23 



ASCLEPIAS. 



A. ^macrophtjUa. Stem erect and smooth ; leaves verticillate in 3's 

 or 4's, very long and smooth, linear-lanceolate, below and on the branches oppo- 

 site, on very short petioles; peduncles shorter than the leaves; nmbels and 

 flowers rather small and smooth; lobes of the corolla oblong-ovate; process of 

 the nectaries strongly curved, acute ; stype of the nectaries rather short. 



Hab. Near Monterey, Upper California. 



ST.AINLEYA. 



S, *frui!cosa. Smooth ; leaves lanceolate, entire, or sparingly denticulate, 

 attenuated into a longish petiole; lamina of the petals longer than the claws; 

 stipe more than twice the length of the pedicel. 



Hab. Rocky Mountains of California. A shrubby species, with flowers very 

 similar to those of S. pinnatijida. Leaves 2 to 2| inches long, less than half 

 an inch wide, the uppermost linear, all thick and apparently succulent. 



BARTONIA. 



B. *multiJlora. Biennial'' stem smooth, white and shining, corymbosely 

 branched ; leaves narrow-lanceolate, sinuate, pinnatifid, attenuated below 

 and sessile; flowers subtended by one or two linear bractes ; petals 10, oblong- 

 oval, obtuse ; capsule urceolate, with three to four valves; segments of the calyx 

 long and subulate ; seeds in a double series, winged. 



Hab. Sandy hills along the borders of the Rio del Norte. Santa Fe, 

 (Mexico.) Flowering in August. 



NICOTIANA. 



N. *caudata. Annual; leaves lanceolate, sessile, acuminated with very 

 long caudated points ; flowers conglomerated in a terminal panicle upon 

 short peduncles; segments of the calyx and corolla much acuminated. 



Hab. Near Monterey. Upper California. 



ERIODYCTION. 



E. ^angusiifolium. Stem and younger leaves glutinous ; leaves long, 

 linear, entire, revolute on ihe margin; beneath canescent and reticulated; 

 flowers small, in paniculate cymes ; sepals linear, somewhat hirsute. 



Had. On the sierra of Upper (California; not seen in flower. 



HUMULUS. 



H. * Americanus. Leaves 3 to 5-lobed, the upper sometimes entire; inner 

 divisions lanceolate-acuminate, denticulate along the apex ; scales of the 

 cone ovate, acute, the lower ones acuminate. 



Hab. 'J'hroughout the United States in alluvial situations. I have also most 

 luxuriant specimens from the borders of streams (Ojito de Navajo) in the Rocky 

 Mountains, near the line of New Mexico, collected by Mr. Gambel. 



*CALYCODON. 



Spikekts, 1-flowered, the flower sessile, bearded at the base. Glumes 2, un- 

 equal, shorter than the flower, membranaceous, the lower truncate, acutely 

 3-toothed, the lower smaller, 1-toothed. 'Palcx 2, the lower sublanceolate, cari- 

 iiate, terminating in a longish scabrous awn, at length indurated, with a silky 



