N. racemosus; caule simplici, foliis indivisis integerrimis vel dentatis inferioribus
obovato-oblongis longe petiolatis, petiolis alatis superioribus oblongo-ovatis sessilibus semi-
amplexicaulibus, raeemo elongato composite, pedunculis involucrisque hirsutissimis.—;
Praaianthes racemosa. Mich. Am. v. 2. p. 84. Pursh, FI. Am. v.2.p. 500.—Harpalyce
racemosa. Don, in Ed. N. Phil. Joum. 1829. p. 308.
Hab. Northern parts of Canada. Michaux. Plains of the Saskatchewan. Dr. Richardson. Drummond.
2. N. altissimus; caule ramoso, foliis trilobis petiolatis angulatis denticulatis margine
scabris, racemis axillaribus, floribus nutantibus, involucris subquinquefloris. Pursh.—Prse-
nanthes altissima. Willd. Sp. PL v. 3. p . 1537. Pursh, FI. Am. v. 2. p. 498. Elliott,
Carol, v. 2. p . 256.—Plukn. Aim. t. 347. f . 2.
Hab. Canada. Pursh. Newfoundland. Mr. Cormack.
3. N. cordatus; caule superne paniculate, foliis petiolatis cordatis (lentatis ciliatis,
floribus sessilibus oblongis integerrimis, panicula laxa racemiflora, floribus nutantibus,
calycibus 6-fidis 6-floris. Pursh.—Praenanthes cordata. Willd. Hort. Berol. t. 25. Pursh, FI.
Am. v. 2. p . 498. Elliott, Carol, v. 2. p. 257.
Hab. Canada. Goldie.—Mr. Pursh acknowledges this to be an intermediate species between the preceding
and N. albus.
4. N. alatus ; annuus, caule simplici, foliis longe petiolatis acutissimis deltoideis sinuato-
dentatis, petiolis alatis, panicula laxa parva, pedunculis involucrisque pubescenti-hirsutis.
(Tab. CII.)
Radix parva, subfusiformis, ut videtur, annua. Caulis simplex, erectus, glaber, pedalis et ultra, superne
pamculatus. Folia sublonge petiolata, membranacea, glabra; superior a sparse pubescentia, deltoidea, acutis-
sima, sinuato-dentata, angulis acutis subdeflexis; suprema lanceolata, sessilia, integerrima. Panicula parva,
laxa. Pedunculi pubescenti-hirsuti. Flores nutantes, majusculi (albi?) Involucrum cyjindraceum, foliolis
squamisque pubescenti-hirsutis. Flosculi 7-9, apice 5-dentati. Styli exserti. Aclienia linearia, striata.
Pappus scaber, pallide fulvus; pilis numerosis.
Hab. Fort Vancouver and Observatory Inlet, on the North-West coast of America. Dr. Scouler.
Tab. CII. N. alatus. Fig. 1, Flower; fig. 2, Fruit; fig. 3, Hair from the pappus '.—magnified.
5. N. albus; foliis radicalibus angulato-hastatis dentatis sublobatis, caulinis subrotundo-
ovatis dentatis petiolatis summis lanceolatis, panicula laxa, faseiculis terminalibus nutantibus,
involucri 8-phyllo 9-10-flori. Pursh.—Praenanthes alba. Willd. Sp. PI. v. 3. p. 1536. Pursh,
FI. Am. v. 2. p . 499. Sims, Bot. Mag. #.1079, (excell.) Elliott, Carol, v. 2. p . 259. Bigel.
FI. Bost. ed. 2. p. 259.
Hab. Lake Huron. Dr. Todd. Quebec. Lady Dalhousie, Mrs. Percival. Newfoundland. Mr. Cormack,
Miss Brenton.
6. N. serpentarius; foliis dentatis asperis • (?) radicalibus palmato-sinuatis caulinis longe
petiolatis sinuato-pinnatifidis subtrilobis lacinia intermedia 3-partita summis lanceolatis,
racemis terminalibus subpaniculatis brevibus nutantibus, involucri 8-phyllo 12-flori.—
Praenanthes serpentaria. Pursh, FI. Am. v. 2. p . 499. t. 24.
Hab. Lake Huron. Dr. Todd. Quebec. Mrs. Percival. Sillery. Mrs. Sheppard. Newfoundland,
Mr. Cormack.—Our specimens, from the localities now mentioned, so exactly accord with the figure above-
quoted of Pursh, that I cannot at all question their being the true Prcenanthes serpentaria; and
of frequent occurrence in the British Possessions. But I believe I am not singular in thinking that it may
be a variety of N, albus,. to which_N. cordatus and altissimus axe too closely allied; from which again our
N. alatus is chiefly to be distinguished by its winged petioles. Prcenanthes virgata of Michaux, P. rubicunda
of Willdenow, and P. simplex of Pursh may perhaps, with equal safety, be referred to N. albus.
3. LYGODESMIA. Don.
Involucrum. pentaphyllum, tubulatum, basi squamulis plurimis brevissimis imbricatis
munitum, foliolis ligulatis carinatis margine scariosis. Receptaculum scrobiculatum.
Flosculi 5. Antherce basi bidentatae. Achenia linearia compressa sulcata apice simplicia.
Pappus capillaris: radiis multiplier ordine copiosissimis (vel paucis) denticulato-scabris
(plumosisve) subpersistentibus.— Suflrutices (sew herb®) Amer. Bor. et Syria, facie Ephedras,
ramosissimi aphylli (in L. juncea evidentissime foliosi) squamis (foliorum rudimentis)
subulatis, patulis sparsis. Flores solitarii sessiles. Pappus carnosusfuscescens. Don.
1. L . juncea; caule ramosissimo striato, foliis lineari-subulatis, pappi pilisnumerosissimis
scabris. (Tab. CIII.)—Don, in Ed. N. Journ. o f Sc. 1829. p. 311.—-Praenanthes juncea.
Pursh, FI. Am. v. 2. p. 498.
Radix subfusiformis, longa, ut videtur, perennis. Caulis erectus vel subdecumbens, herbaceus, pedalis
ad bipedalem, per totam longitudinem ubique valde ramosus, striatus, subglaucus, ramis erectis vel flexuosis,
longis, subvirgatis. Folia alterna, fere omnino ad insertionem ramorum, rigida, subglauca, lineari-subulata,
striata, integerrima, sessilia sed non amplexantia; inferior a 2 uncias longa, superior a sensim minora. Rami
ultimi, seu pedunculi, graciles, uniflori, bracteis seu foliis parvis subulatis suffulti. Flores terminales, unciam
longi, caerulei. Involucrum cylindraceuin, e foliolis 5, erectis, lineari-oblongis, membranaceis, margine
subscariosis, basi squamosis; squamis erectis, imbricatis, brevibus. Flosculi 5, majusculi. Corolla ligulata,
lata, 5-dentata. Staminum tubus elongato-cylindraceus: Antherce basi utrinque breve calcaratxe. Stylus
inclusus. Stigmata exserta, linearia, erecto-patentia, glanduloso-pubescentia. Achenia oblonga, striata,
ad orem dilatata. Pappus sessilis e pilis numerosissimis sub lente scabris.
Hab. Dry plains of the Saskatchawan. Drummond.—There is a peculiarity in the habit of this plant, as
Mr. Don justly observes; and I have adopted that Botanist’s genus and character of Lygodesmia,
including, indeed, the Prcenanthes triquetra of Labillardiere, a Syrian plant, with which I am unacquainted.
The American P. pumila, Baldw. mentioned by Don, (I presume the P. aphylla of Nuttall, Nov. Gen. v. 2.
p. 123,) is equally unknown to me. With the exception of the leaflets of the involucre not being carinated
in our L. juncea, it agrees in every point with Mr. Don’s Lygodesmia: but a second species, next to be
mentioned, has a pappus of a very different character, yetis unquestionably the same genus. In neither,
however, can the stems be said to be leafless, nor can they be compared.to those of Ephedra.
Tab. Clir. L. juncea. Fig. 1, Flower; fig. 2, Floscule; fig. 3, Anthers and stigmas ; fig. 4, Achenium ;
fig, 5, Portion of the hair of an achenium '.—magnified.
2. L. minor; caule ramosissimo obscure striato, foliis lineari-subulatis brevibus, pappi
pilis sub-16 plumosis.— (T ab. CIII. ƒ A. quoad fruet;)-—Praenanthes juncea. Douglas,
MSS. in Herb. Hort. Soc. (non Purshii.)
Hab. On gravelly or sandy banks of the Columbia, near Wallawallah, frequent Douglas.—This is,
according to Mr. Douglas, 1—2 feet high. The specimens I possess scarcely exceed 10 inches, and the leaves
and flowers are smaller than those of the preceding species; yet in every other respect the plants are so
similar that it is .scarcely possible to distinguish them until the pappus be examined. This is totally different
from that of L. Juncea; for whereas there it is composed of an infinity of very slender, tawny, and merely
scabrous hairs, here it consists of about 16 feathery hairs.
Tab. CIII. A. Flower and portion of a hair from the pappus of Lygodesmia minor.