vel fere obcordatis, mucronatis, spinuloso-deuticulatis. Stipules ovatæ, acuminate, reticulate, basi mem-
brauaceæ, albidæ, margine spinuloso-laciniatæ. Pedunculi latérales, terminalesque digitem longi. Involucrum
magnum, cyathiforme seu hemisphæricum, membranaceum, venosum, intra veuas transversim rugosum, pallide
viride, basi albida, margine multifido, segmentis brevibus latis subtriangularibus inæqualitef dcnticulatis.
Capitula hemisphærica, compacta, multiflora, Vis’ involucro longiora. Calyx oblongus, membranaceus,
scariosus, albus, minutissime reticulatus atque venosus, subiuflatus, dentibus corollam æquantibus, sctaceis, 2
superioribus brevioribus, 2—3-partitis, 2. lateralibus 3-partitis, inferiore reliquis longiore 3-partito, laciniis
trifidis, segmentis omnibus magis minusve patentibus. Corolla pallide rosea. Vexillum oblongum basi
latum, vix unguiculatum, rectum, liberum. Ales vexillo vix breyiores ; Carina staminaque in unum corpus
coalite German oblongum: Stylus filiftemis. Legumen ovali-oblongum;, compressiimydehiscens, dispermum.
Semina subrotunda, compressa, loevia.
H ab. Moist*valliës in the interior of North-West America,-bordering upon the Columbia. Douglas.—
This is one of the most curious and elegant of the genus. The involucre, in size,*colour,- and texture,
resembles that of Astrantia, but is formed of one entire piece or cup, in which the flowers are almost wholly
imbedded. The corolla is very short, and the vexillum quite free from adherence with the other petals.
Tab. L. Fig. J, Back view of a flower ; fig. .2, Front view of do. ; fig. 3, Calyx laid open ; fig A , Legumen ;
.fig, 5,, S e e d magnified.
-6. HOSACKIA. -Benth.
Ccd. campanulatus, 5-fid us» ALlæ vexillum subæquantes patentes. Carina rostrata.
Stylus filiformis. Stigma capitatum. Legumen cylindraceum, v. subcompressum, rectum,
lævé.—Herb'æ, foliis impari-pinnatis '(rarius simplicibus, H.), foliolis sæpius alternis,
stipulis membranaceis minutis aut obsolétis. Benth.
1. H. bicolor ƒ glabra, decumbens, foliolis suboppôsitis 7-9- oblongis obovatisve, -stipulis
cordato-ovatis membranaceis obtusissimis,: floribus umbellatisj bractea monophylla vel
nulla. Douglas, MSS.^—Benth. in Bot. Beg. t. 1257.—Lotus pinnatus. Hook, in Bot. Mag.
t. 2913.
Hab. Frequent in low alluvial soils between Fort-Vancouver and the Grand Rapids on the-Columbia,
and also near the base of Mount St. Helen, in similar situations. Douglas.—Neither my dried specimens,
nor the recent cultivated ones,-whifch I have examined, exhibit such remarkably patent alee as are figured on
this plant in the Botanical Register,- perhaps because they were not fully expanded. I willingly, however,
follow iny valued friend, Mr. Bentham; in considering the genus to be distinct from Lotus. Bufr if lam
correct in referring my fourth species to it; the leaflets are sometimes reduced-to a single one ; while in the
Ft. Purshiana, Benth. (Lotus sericeus, Pursh ; Trigonella Americana, Nutt.) according to my authentic
specimens from Mr. Nuttall, there are constantly three leaflets to each leaf, as in Lotus there are spurious
spongy dissepiments between the seeds. The flowers are yellow, except the alee which are white and waved.
2. H. decumbens; pubescenti-hirsuta, decumbens, foliolis alternis 4 -5 ovali-subeuneatis
acutis, stipulis minutissimis acutis deciduis, floribus umbellatis, bractea 1-3-foliolata.—
Benth. in Bot. Beg. sub t. 1257.—Lotus incanüs. Douglas, MSS.
Hab. . Plentiful on gravelly soils near the mouth of the Columbia, at Fort-Vancouver. Douglas ;
Scouler; and on the banks of the Multnomak. Douglas.—This throws out numerous stems from the root,
which are one and a half to two feet long, bearing many umbels of flowers, which are wholly yellow. The
alee are even, and narrower than in’the preceding species.
3. H. parviflora; erecta, glabra, basi.præcipue. ramosa, foliolis alternis 4-6 oblongoobovafis
subtus'glancfcÿ stipulfé obsoletis'de'ciduisj;qfedunculis l-floris/'bfattfea sub flore
sæpissimë 3-foliÔlàta.—Benth. in Bot. Beg. sùb t. 1257.
Radix annua,, parva. Caules spithamæi, erecti. Stipules qito deciduæ. Pedunculi 2 lineas longi, solitarii,
superne unibracteati, uniflori, bracteis plerumque 2-3-foliolatis, flore minute flavo. Aies vix divergentes.
Stigma capitatum. Fructum non vidi..
Hab. California» Menzies, (in Herb, nostr.)• common on soils where wood has been destroyed by fire,
on the.shores, of the Columbia. Douglas.
4. H. uhifoliolata ; decumbens, hirsuta, valde divaricato-ramosa, foliis ünifoliolatis
rarissime 2-3-foliolatis subsessilibus, foliolis ovalibus basi apieeque acutis, stipulis
obsolétis, pedunculo unifloro, bractéa sub flore ovata monophylla.
Radix annua, inferne fibrosa. Caules decumbentes, valde ramosi, subhirsuti, ramis divaricatis, flexuosis.
Folia fere omnino sessilia, unifoliolata, petiolo articulata, rarissime 2-3-foliolata, foliolis semiunciam longis,
ovalibus, Subobliquis, basi apieeque acutis, pilosis. Stipulée minutissimæ, acute, cito deciduæ. Pedunculi
breves, -2-3 lineas longi, hirsuti, axillares, solitarii, uniflori, sub calyce bractea ovata (folio similHma sed
minore).'suffultL Flos minutus, cernuus. Calyx hirsutus, tubo obconico, dentibus subulatis corolla vix
brevioribus. Corolla flava. Vexillum obovatum. Ales oblongæ, recte, subundulate. Stamina diadelpha,
9-1. Germen lineare, glabrum : Stylus germine brevior, sursum curvatus : Stigma capitatum. Legumina
lineari-cylindracea, basi calyce cincta, unciam longa, basi styli terminata, fusca, sub lente pallide punctata,
margine superiore præcipue incrassata, unilocularia, loculo isthmis transversalibus spongiosis completis
interrupto. Semina 5-6, reniformia, lævia, fusca.
H ab. Shores of the Columbia. Dr. Scouler.—In size and shape of the leaflets, and in hairiness, this
species approaches to the Ft. decumbens of Mr. Bentham; inits flowers, to H. parviflora ; and,inthe bractea,
calyx, and seed-vessel, to Hi Purshiana, Benth.; in its almost universally solitary leaflets, and in its much
branched and divaricated stems, it is very unlike any other. 1
9. PSORA LEA. Linn. .
Sep. 5, ad medium concreta in ealyeem 5-fidum persistentem, tubo sæpius glandulosb,
lobis acummatis infime paulo productiore. Stam.10, sæpius diadelpha, decimo interdum
basi cum cæteris connexo. Legumen calycis longitudiné, evalve, 1-spermum, interdum
in rostrum desinens.—Frutices aut Herbæ tuberculis glandulosis sæpius verrucoses. Folia
varia, .stipulis petiolo bast adnatis. . .Flores dispositionsvarii, coervlei albidi-purpuras-
centisvej DC.
1. P. lanceolata; subglabra, ramis erectis, foliis 3-foliolatis, foliolis sessilibus lineari-
lanceolatis superne. latioribus mucronatis, racemis axillaribus capitatis, pedunculis folio
plerumque:brevioribus, stipulis linearibus, bracteis ovato-lanceolatis pedicello longiori-
bus, calycis dentibus subæqualibus brevibus aGutis, leguminibus globosis hirsutis. (T ab.
LI.)—Pursh, PI. Am. v:'2. p. 475.-^-P.’ elliptica.- Pursh, PI. Am. v. 2. Suppl, p. 741, (fide
JStutt.)— P. arenaria. Nutt. Gen. v. 2. p. 103. De Cdnd. Prodr. v. 2. p . 2 19.
Radix perennis, subfusiformis, descendens. Caules herbacei, glabri, superne appressim paululum hirsuti,
striati, glandulosi, basi decumbentes dein erecti, subvirgati, pedales et ultra, ramosi; rami altérai, erecti!
Folia petiolata, 3-foliolata; foliolis glabris rarius subpilosis, lineari-lanceolatis superne dilatatis, mucronatis,
integerrimis, nunc obovato-cuneatis basi attenuatis, subcarnosis, aveniis, omnibus sessilibus sesquiunciam ad*
duas uncias longis, utrinque glandulis fuscis obsitis. Petioli foliis longitudiné. Stipules lineares, libene, non
cum petiolo adnate. Pedunculi axillares, solitarii, petiolo longiores, folio plerumque breviores. Racemus
brevis, capitatus, 8-10-florus. Bracteoe ovato-lanceolate, glandulosæ, • pedicello longiores, post florescentiam