BOTANY. 
87 
Gentiana acuta, Michx, var. stricta. Banks of Hat creek, California. 
Gentiana simplex (Sp. nov.:) caule unifloro e radice annua simplicissimo parce foliato gracili 
(semipedali et ultra;) foliis lineari-lanceolatis oblongis crassiusculis ; calyce quadrifido, seg¬ 
ments lanceolatis ; corolla coerulea infundibuliformi imberbi baud coronata, lobis 4 oblongo-spa- 
tbulatis integerrimis ; antheris brevibus discretis ; stylo brevi; stigraatibus rotundato-dilatatis; 
capsula stipitata ; seminibus alatis. Upper Klamath lake ; August. 
It is not easy to fix upon the section of the genus to which this pretty and well-marked 
species should be referred. The discoverer not unnaturally took the plant for a Cicendia, not¬ 
withstanding the size of the blossom ; but the stout style is persistent on the capsule and splits 
through in dehiscence, and all the characters are those of a Gentian. The slender stems are 
always simple, and bear from two to four pairs of small leaves, the uppermost remote from the 
solitary flower. The showy corolla is fully an inch long, and of a bright blue color. The 
stigmas are large and broad ; the ovary tapers below into a decided stipe, which in fruit is half 
the length of the oblong capsule; and the seeds are broadly winged ; their insertion sutural. 
Plate XVI. Gentiana simplex. Three entire plants. Fig. 1. The calyx laid open, and the 
ovary transversely divided. 2. Upper part of the corolla laid open, with the stamens, and the 
upper part of the pistil. 3. A capsule, dehiscent, with its stipe. 4. Seeds. The details 
variously magnified. 
Erythraea Muiilenbergii, Griseb. in DC. Prod. 9, p. 60. This is the u Canchalagua” of 
the natives of California, for which high medicinal virtues are claimed. It grows plentifully on 
the low grounds bordering Suisun bay ; the flowers are rose red, numerous, and very pretty. 
Menyanthes trifoliata, Linn. Common in marshes in the Sacramento valley. 
APOCYNACEiE. 
Apocynum androsa:mifolium, Linn. Banks of Pit river and McCumber’s, California. Plant 
always smaller than in the Eastern States. 
Apocynum cannabinum, Linn. Pit river, lower canon ; August 6. 
ASCLEPIADACEiE. — (By J. Torrey.) 
Asclepias Fremonti, Torrey. McCumber’s, N. Cal. 
Asclepias fascicularis, var. foliis latioribus, Decaisne in DC. Prod. p. 569. Common in 
N. California and southern Oregon. 
OLEACEiE. 
Fraxinus Oregana, Nutt. Sylv. 3,p. 59. Fort Beading, California. 
ARISTOTOCHACEiE. 
Aristolochia Californica, Torr. in Whippl. Pep. p. 178. Banks of Sacramento near Fort 
Reading, California. 
Asarum hookeri, Field. Sert. t. 32. Cascade mountains, 0. T. 
CHENOPODIACEiE.— (By John Torrey.) 
Obione argentea, Moq. Chenop. p. 76. Klamath lake. 
Blitum rubrum, Reich. ; Moq. in DC. Prodr. 13, ( pars 1 ,) p. 83. Klamath lake. 
Atriplex patula, Linn. Klamath. 
