122 
BOTANY 
Pedicularis densiflora, Benth. in HooJc. FI. Bor. Amer. 2, p. 110, in DO. 1. c., p. 574. 
Napa Valley, California ; April 5. In fruit. 
Pedicularis attenuata, Benth. in DC. 1. c. Mountains near Oakland, California; April 5. 
In flower. 
BIGNONIACEflE—SESAMEiE. (By A. Gray.) 
MOHAVEA, Nov. Gen. 
Calyx alte 5-partitus, laciniis lanceolatis foliaceis fere cequalibus. Corolla hypogyna, pro- 
funde bilabiata personata, limbo amplo patenti tubo campanulato multo longiore ; labio postico 
latissimo rotundo emarginato-bilobo, festivatione. exteriore, basi fornice supra antheras arcuata 
instructo ; labio antico consimili subtrilobo, palato prominente medio barbato. Stamina fertilia 
2, tubo corollae inserta: filamenta apice incurva; antheras approximata rotundo-reniformes, 
confluentim uniloculares. Filamenta sterilia saapius 2, exigua. Stylus columnaris: stigma 
compresso-capitatum, integrum. Ovarium ovoideum, biloculare, placentis axilibus, apice tan- 
tum placentis baud coalitis uniloculare, parietibus membranaceis. Ovula multa, pluriseriata, 
liorizontalia vel adscendens, anatropa. Fructus ignotus. Herba humilis, ramosa, diffusa, pilis 
viscidis et glanduliferis pubescens ; radice annua; foliis alternis, imisve oppositis, oblongo seu 
ovato-lanceolatis, integerrimis vel repando-angulatis, penninerviis, basi angustata parallelin- 
erviis ; floribus axillaribus solitariis, pedunculis nudis brevibus ; corolla ochroleuca? et pur- 
purascente, fauce cum palato purpureo picta. 
Moiiavea viscida. Mohave Creek, California ; March 2. Leaves 1| to 2 inches long. Sepals 
half an inch long, exceeding the short tube of the corolla. Lips of the corolla nearly an inch 
broad, apparently flat. Filaments and style somewhat hairy towards the base, included within 
the throat. Ovary 2-celled, except near the summit, with no dorsal introflexion of the walls, 
the placentas not bilammelar. Style nearly as long as the stamens. Notwithstanding the ovary, 
which is strictly 2-celled, except at the top, we suspect this curious plant to belong to the Big- 
noniaceas-Sesameae; but the fruit alone can determine the question. If the seeds prove to be 
albuminous, we know not where in the order Scrophulariaceas to place it. In one of our few 
specimens a singular abnormal body was found growing from the outside of the corolla at its 
base, resembling a long-clawed petal, with a small, truncate, saccate, and involute limb. It is 
evidently a monstrosity. 
VERBENACEiE. 
Verbena prostrata, B. Br. in Hort. Kew. ( ed. 2) 4, p. 41; Scliauer in DC. Prodr. 11, p. 
547. Banks of the Mokelumne River, California, May 17. 
LABIATE. 
Pycnanthemum Californicum ( Torr. in Durand , PI. Pratt, in Jour. Acad. Phil. 2, p. 99): 
incano-pubescens, foliis ovato-lanceolatis sessilibus parce denticulatis ; verticillastris 2-4 den- 
sissimis, demum scorpoideo-explanatis multiradiatis ; calycis dentibus asqualibus lanceolatis 
muticis. California, probably from the lower part of the Sacramento Valley. Gathered by 
Colonel Fremont, (1846), Rev. A. Fitch, & Mr. Shelton. 
P. Californicum, var. foliis tenuioribus oblongis glabriusculis viridibus. River banks and 
ravines, Mokelumne, California, (with the persistent inflorescence of the preceding year).— 
This plant is a genuine Pycnanthemum, and is most nearly related to P. muticum. No other 
species is found west of the Rocky Mountains. The inflorescence is at first in the form of com¬ 
pact heads, of which there are usually three on the main axis. Late in the season these unfold 
into very dense sessile cymes, the branches of which are secund, and nearly an inch in length, 
