of Kotzebue’s Sound. Lay and Collie in Captain Beecherfs Collection.—This is, according to all accounts, a
very variable species. Of the larger and sharp-leaved variety, (S. ulmifolia, Scop.) a good figure is given in the
Bot. Reg., and that is, as Mr. Lindley justly observes, the original S. chamcedryos foliis of Amman, St. Rar.
p. 190.
Sect. III. Spira r ia . Ser.
4. S. betulifolia; foliis late ovalibus breve petiolatis glabris superne prsecipue inciso-
serratis sublobatis subtus pallidis,. corymbis compositis latds glabris foliolosis, floribus
numerosissiinis (parvis), ovariis 5 glabris.—Pall. FI. Boss. t. 16. Pursh, FI. Am. v. 1. p.
342? Wats. Dendrol. t. 67. (fig. bona.) De Cand. Prodr. v. 2. p . 544.—S. lucida. Douglas,
MSS. apud Hort. Soc. Lond.—A foliis majoribus magis lobatis subtus pallidioribus.
Hab. «. and A Vallies of the Rocky Mountains, in lat. 52°-54°. Drummond. In the subalpine regions
of Mount Hood, and in the Blue Mountains, near Lewis and Clarke’s River, North-West America. Douglas.
—Stems 1-2 feet high; branches erect, red, glabrous, as is every part of the plant. Leaves 2-3 inches long,
membranaceous. Flowers very small and numerous, crowded, forming a flat, broad, compound corymb,
white, (Douglas,) yellowish when dry. This agrees tolerably well with Pallas’ figure of the Siberian S.
betulifolia, as far as can be judged from the fructified state of the plant, which is alone given in the Flora
Rossica. The leaves and inflorescence in Mr. Watson’s representation are very characteristic of our plant.
Muhlenberg’s and Rafinesque’s S. corymbosa (see Torrey’s FI. v. 1. p. 482,) seems to differ from this principally
in being slightly downy.
5. S. salidfolia; glabriuscula, foliis lanceolatis argute subduplicato-serratis, lobis ealycinis
triangularibus patulis, racemis elongatis, floribus densis, carpellis 5 glabris. Linn. Sp. PI.
p. 700.-H3- floribus albis.— S. salicifolia, Mich. Am. v. 1. p. 293. Pursh, FI. Am. v. I. p
340. Torrey, FI. o f Un. St. v. 1. p . 481. Rich, in Frankl. 1st Joum. ed. 2. App. p . 19.
De Cand. Prodr. v. 2. p. 544. Elliott, Carol, v. 1. p. 560.—S. alba. Ehrh.—Bigel. FI. Bost.
ed. 2. p . 197. Wats. Dendrol. t. 133.— S. salicifolia, y. paniculata. Ait. Hort. Kew.
Hab. A Throughout Canada, and as far north as the Saskatchawan. Newfoundland. Sir Alexander
Cochrane.
6. S. tomentosa; ramis pedunculisque ferrugineo-tomentosis, foliis ellipticis duplicato-
serratis sublobatis subtus ferrugineo-tomentosis, panicula confertiflora attenuata, floribus
parvis, staminibus corolla rosea vix longioribus, lobis ealycinis triangularibus reflexis, carpellis
5 tomentosis.—Linn. Sp. PI. p. 701. Mich. Am. v. 1. p . 293. Pursh, FI. Am. v. 1. p . 341.
Torrey, FI. o f Un. St. v. 1. p. 481. Bigel. FI. Bost. ed. 2. p. 197. EUiott, Carol, v. 1. p . 560.
Hab. Canada, (Michaux, Mrs. Percival, Mrs. Sheppard,) and as far as Lake Winipeg. Dr. Richardson,
Mr. Drummond.
7. aS'. Douglasii; ramis pedunculisque pubescentibus, foliis ellipticis superne grosse
inaequaliter serratis subtus incano-tomentosis, panicula confertiflora oblonga obtusa, floribus
parvis, staminibus corolla rosea duplo longioribus, lobis ealycinis triangularibus reflexis,
carpellis 5 glaberrimis nitidis.
Hab. North-West coast of America, about the Columbia and the Straits of de Fuca. Douglas, Dr.
Scouler.—This is unquestionably different from S. tomentosa, being much larger in the branches and leaves,
with a white (never ferruginous) tomentum. The leaves are serrated only in their upper half, and there
very coarsely; the panicle is never attenuated, but very obtuse, the flowers are smaller, the stamens longer,
and the capsules are quite glabrous and shining.
8. S. Menziesii; ramis superne pedunculis calycibusque triangularibus reflexis laeviter
pubescentibus, foliis ellipticis superne grosse inasqualiter serratis subtus concoloribus glabris,
panicula confertiflora oblonga obtusa, floribus parvis, staminibus corolla rosea duplo longioribus,
ovariis 5 glabris.
Hab. North-West coast of America. A. Menzies, Esq.—The only specimens I have ever seen of this
plant are from my valued friend Mr. Menzies. In habit it quite agrees with the preceding species, but it is
entirely destitute of the white tomentum on the underside of the leaves and older branches, which are
wholly glabrous: the latter are glossy, deep purplish-brown.
9. S. arioefolia; foliis lato-ovatis obtuse lobatis inasqualiter mucronato-serratis subtus
pallidioribus hirtis, panicula ampla ramosissima laxa pubescenti-hirsuta, pedicellis brac-
teatis, lobis ealycinis acutis patentibus, carpellis 5 compressis marginatis patenti-hirsutissimis.
—Sm. in Rees’ Cycl. De Cand. Prodr. v. 2. p. 544. Lindl. in Bot. Reg. t. 1365.—S. discolor.
Pursh, FI. Am. v. 1. p. 342. De Cand. Prodr. v. 2. p . 545. Torrey in PI. o f Rock.
Mount, p . 195.
Hab. Banks of the Kooskooskye River, North-West America. Lewis. Frequent along the coast of the
Pacific, from lat. 40° to 49°, north, forming part of the underwood of the forests, (Douglas,) and on the
rocky banks of the Spokan, Flathead, Salmon, and M'Gillivray Rivers, in the interior. Mr. Menzies, Douglas,
Dr. Scouler.—The leaves are more or less hairy, and more or less pale, but never so white as to be “ niveo-
tomentosa,” or to justify the name of " disbolor” being given to the plant, as far as our specimens are concerned;
but in the S. discolor of Dr. Torrey, according to a sample in my Herbarium, the leaves are snowy white
with hairs on the underside.
S e c t . IV. S o r b a r ia . Ser.
10. S. sorb folia; foliis pinnatis, foliolis lanceolatis oppositis duplicato-argute serratis
sessilibus. Linn. Sp. PI. p. 702. Pall. FI. Ross. t. 25. Pursh, FI. Am. v. 1. p . 342. De
Cand. Prodr. v. 2. p . 545.
Hab. On the North-West coast of America, and “ probably in Canada,” (Pursh,) but I have never seen
a specimen from either of these widely separated regions.
S e c t . V. A r u n c u s . Ser.
11. S. Aruncus; foliis tripinnatis, foliolis oblongo-ovatis acuminatis duplicato-serratis
terminali ovato, spicis laxis valde paniculato-ramosis, carpellis glaberrimis.—Linn. Sp. PI.
p. 702. De Cand. Prodr. v. 2. p . 544.—a Americana. Mich. Am. v. 1. p. 294. Pursh,
FI. Am. v. 1. p. 343. Elliott, Carol, v. 1. p. 561. Torrey in PI. o f Rock. Mount, p. 194.
—S. acuminata. Douglas, MSS. apud Hort. Soc. Lond.
Hab. Moist woods, near the source of the Columbia. Drummond. Mouth of the Columbia, and at
Puget Sound. Douglas, Dr. Scouler.—Mr. Douglas is disposed to consider this plant distinct from the S.
Aruncus of the United States and of Europe; but I confess I can see no difference.
5. GILLENIA. Mcench.
Cal. tubuloso-campanulatus ore contractus 5-fidus. Pet. 5, lineari-lanceolata, subin-
asqualia, ex apice tubi. Siam. 10-15 inclusa. Carpella 5 stylo filiformi erecto apice capital
» superata, subconnata.in capsulam 5 loc. Seminafin locujis 2.—Herbse perennes, foliis
trifoliolatis, foliolis petiolulatis serratis, floribus longe pedicellatis ex albo roseis axillaribus
terminalibusque. Radices emetico-catharticoe. DC.