deciduse. Calyx brevi-campanulatus, appresse pilosus, glandolosus, dentibus brevibus subaequalibus acutis
ciliatis. Flores parvi, (caerulei, PA.) Vexillum subrotundum, unguiculatum. Carina obtusa, cum alts
oblongis obtusis coadunata. Stamina diadelpha, 9-1. Legumen globosum, magnitudine scminis Pisi sativi,
glandulosum, pilis albidis appressis brevibus tectum, stylo subulato terminatum. Semen subrotuudatum,
solitarium, compressum, Iseve, fuscum.
Hab. ThisJ which was first, discovered by Lewis on the banks of the Missouri, is found by Mr. Douglas
inhabiting dry, parched, and sandy soils, from the mouth of the Columbia to its source: and by Mr. Drummond
on the east side of the Rocky Mountains, on the Saskatchewan, from Carlton-House to Edmonton-
House.—I have followed Mr. Nuttall in considering the P . elliptica of Pursh the same as the P. lanceolata ;
but I see no reason why one of these two original names should not be retained.
Tab. LI. Fig. 1, Flower; fig. 2, Vexillum; fig. 3, Ake and carina combined; fig. 4, Stamens, including
the Pistil; fig. 5, Legumen; fig. 6, Seed:—natural size. Fig. 7, Legume; fig. 8, Seed:—all but figs.
5 and 6, magnified.
2. P. physodes ; glabriuscula, foliis pinnatim 3-rarius 5-foliolatis, foliolis lato-rhombeo-
ovatis acutis mucronatis obscure glandulosis terminali longe petiolato, racemis peduncu-
latis laxis axillaribus folio longioribus, calycibus valde inflatis hirsutis corolla vix
brevioribus, dentibus subaequalibus.—Douglas, MSS. in Herb. Hort. Soc.
Hab. Banks of streams, in open, sandy and gravelly soils, from the Great Falls of the Columbia to the
Rocky Mountains. Douglas.—This species is well distinguished by its large leaflets and their form, together
with the large inflated calyces, which almost conceal the flowers, and wholly so the elliptical, compressed,
scarcely glandular, slightly hairy, 1-seeded legumes.
3. P. argophylla ; pulcherrime argenteo-sericea, erecta, ramis divaricatis, foliis palma-
tim-3-5-foliolatis, foliolis elliptico-lanceolatis, spicis pedunculatis folio, longioribus
interruptis bracteatis, bracteis subbifloris, calycis dente inferiore longissimo. (Tab.
LII.)—Pursh, FI. Am. v. 2. p. 475.—P. incana. Nutt, in Fraser's Cat. 1813. Gen. v. 2.
p. 102.
Tota planta, sed prsecipue folia juniora, ramuli calyces bracteaeque pilis mollibus appressis pulcherrime
argenteo-sericea. Caules erecti, ramosi, striati, ramis patentibus. Folia 3-seu 5-foliolata, foliolis digitatis,
elliptico-lanceolatis, acutis, breve petiolulatis, 2-3 uncias longis. Petiolus folio brevior. Stipules lineares,
libera, semiunciam vel unciam fere longae. Pedunculi axillares, folio duplo longiores. Flores (purpurei,
PA.; azurei, Nutt.'), interrupte et verticillatim spicati, verticillis bracteatis. Bractece subbiflorae, calycis
longitudine, lanceolata*. Calyx densissime sericeo-villosus. Tubus brevis: dentes subulati, 4 superiores
subaeqnales; inferiore elongato petalis longiore. Vexillum ovatum, unguiculatum, ad basin laminae bicallosnm.
Ales oblongae, unguiculatae, cum carina obtusa unitae. Fructus mihi ignotus.
- Hab. Dry soils on the banks of the Red River, in lat. 50°, (Douglas,) to the Saskatchawan in lat. 54°,
from Carlton-House to Edmonton-House. Drummond; Douglas.—Few plants can exceed this in beauty;
even in the dry state, its silvery hue is quite remarkable, and the flowers are either bright azure-blue,
according to Nuttall, or purple, according to Pursh. The former author observes that the stems are rarely
branched: such is not the case with our specimens.
Tab. LII. Fig. 1, Portion of a spike; fig. 2, Flower; fig. 3, Vexillum; fig. 4, Alae and carina:—more or
less magnified.
4. P. macrostaehya; foliis pinnatim-3-foliolatis pubescentibus, foliolis ovatis mucronatis,
petiolis glanduloso-scabris, pedunculis axillaribus folio quadruplo longioribus, spicis
cylindraceis rachi bracteis calycibusque hirsutissimis.—De Cand. Prodr. v. 2. p. 220.
Hab. Nootka. (Lagasca in De Cand.)—“ Bractece acuminatae calycis longitudine. Spica subramosa.” DC.
5. P. braehiata; caule erecto flexuoso subramoso pateriti-villosissimo* foliis palmatim
5-foliolatis appresso-hirsutis, foliolis ellipticis* pedunculis axillaribus elongatis folio
longioribus, racemis oblongis, spicatis laxiusculis, bracteis dentibusque calycis foliaceis
lanceolatis, floribus erectis. (Tab. LIU.)—Douglas, MSS. in Herb. Hort. Soc.
Radix fusiformis, crassa, 4—10 uncias longa. Caulis pedalis ad sesquipedalem, herbaceus, erectus,
flexuosus, parce ramosus ramis patentibus, striatus, crassus, ubique pilis longis patentibus albis valde villosus.
Folia patentia, palmatim 5-foliolata, longe petiolata, appresse villosa, pilis albidis subsericeis; foliolis 2 fere
tres uncias longis, ellipticis, acutis, basi attenuatis, nonnunquam obovato-cuneatis. Petiolus digitalis
et ultra, patenti-villosus. Pedunculus axillaris, solitarius, folio longior, patenti-pilosus. Racetnus spicam
elongatam bracteosam efformans, 3-4 uncias longus, sesquiunciam latus, albido-villosus. . Bractece florem sub-
aequantes, lanceolate, foliacese, virides, superiores subcaerulescentes. Calyx fere unciam longus, pilis longis
albis hirsutus. Tubus breviusculus, subcampanulatus, membranaceus, laciniis foliaceis 4 superioribus lineari-
lanceolatis corolla paulo brevioribus, inferiore majore lanceolata corollam subaequante. Corolla: Vexillum
ovale, album, inferne in unguem attenuatum, ad basin laminae utrinque subcallosum. Carina caerulea cum
alis unita. Stamina diadelpha, 1, 9, tubo ad apicem in dentibus latis antheriferis alternim longioribus fisso.
Germen oblongum, glabrum. Stylus longus, subulatus, inferne hirsutissimus, apice sursum curvatus. Stigma
capitatum.
H ab. Plains of the Saskatchawan from Carlton-House to Edmonton-House. Drummond; Douglas.—
This, Mr. Douglas observes, is the Navet de Prairie of the Canadian « Voyageurs” : and, I must confess, that
had I been left to judge of the species solely from the figure and description of Pursh, I should have had no
hesitation in considering it as Psoralea esculenta: but Mr. Douglas, who has compared the plant with Lewis
and Clarke’s original specimens of P.esculenta, in Mr. Lambert’s Herbarium, pronounces it to be quite distinct;
although the chief differences he mentions are the more slender habit, and longer and laxer spikes of our
plant. Again, he observes that the P. esculenta of Nuttall, of which an original specimen is likewise in the
Lambertian Herbarium, is distinct from both; and, indeed, Mr. Nuttall describes it as nearly stemless. The
roots, though stringy, dry, and tough, and containing but little farinaceous matter, are gathered and eaten
by the Cree Indians raw, or sometimes roasted.
T iB . LIII. Psoralea braehiata. Fig. 1, Back v iew of a flower; fig. 8, Front TOW of do.; fig. 3, The
vexillum; fig. 1, Portion of the stamens, and style with the stigma; fig. 5, Pistil -.—magnified.
8. PETALOSTEMUM. Mich.
Cal. 5-iidus, aut 5-dentatus. Pet. 5, unguiculata, inter se subsimilia. Stain. 5 interjects
et emit iis in tubum concreta; vexillum conduplicatum liberum. Legumen calyce
tectum 1-spermum indehiscens.—Herbae perennes Boreali-Americana, glanduloso-pmctata.
Folia impari-pimata. Flores dense spicati, spicis pedunculatis. Pedunculi oppositifolii,
terminates, ramo abortive facti. DC.
1. P. candidum; spica cylindrical bracteis calyce glabro longioribus, foliolis 8-jugis
lineari-oblongis glabrisKlIficA. Am. 8. 2. p. 49. t. 37. f . 1. Pursh, PI. Am. v. 2. p. 461.
De Cand. Prodr. v. 2. p , 243.—Dalea Candida. JVilld.—Psoralea Candida. Poir.
H ab. Banks of the Saskatchawan, and upon the Red-Deer and Eagle Hills of that river. Drummond;
Douglas. On the Red River. Douglas.—Petals white. This, and the following, and probably all the species
of the genus, have glandular dots on their leaved, as in Psoralea.
2. P. violacea; spica oblongo-cylindracea, bracteis calyce sericeo-pubescente longioribus,
foliolis bijugis anguste linearibus, s.ubbirsutis__Mich. Am. v. 2. p. 50. t. 37. f . 2.
VOL. I. S