16. ALCHEMILLA. fo u rn .; DC. prodr. 2. p. 589.
Calyx-tube obconic, contracted at the throat by an annular disk ; the limb
4- (rarely 5-) parted, with as many smaller alternate lobes (bracteoles).
Petals none. Stamens 1-4. Ovaries 1-4,' stipitate or sessile in the bottom of
the calyx: style arising from near the base of the ovary, filiform : stigma
mostly capitate. Achenia 1-4, included in the persistent calyx. Seed fixed
near the base of the carpel (at the origin of the style), ascending, almost
orthotropous. Radicle superior.—Low herbs, mostly with palmately lobed
or compound leaves, adnate stipules, and small corymbose flowers.
§ 1. Perennial: alternate lobes of the calyx or bracteoles smaller than the
others : stamens 2-4.—Acchemilla, Linn.
1. A. vulgaris (Linn.) : leaves radical, reniform, 7-9-lobed to about one-
third their depth; the lobes somewhat semi-orbicular, serrate throughout;
flowers in terminal dichotomous corymbs— FI. Dan. t. 963; Engl. bot. t.
597 ; DC.! prodr. 2. p. 589; Hook. ! jl. Bor.rAm. 1. p. 197,
Greenland! and Labrador! but not elsewhere detected in N. America.
2. A. alpina (Linn.): leaves radical, 5-7-parted to the base; the segments
cuneiform-oblanceolate, incisely. serrate with appressed teeth at the
apex, silky beneath; flowers corymbose.—FI. Dan. t. 49 ; Engl. bot. t.
244; Pursh, fl. 1. p. 112. ' • . T T
Greenland: also- on the summits of the White Mountains, New Hampshire,
and Green Mountains, Vermont, according to Pursh; but this is extremely
doubtful. .
§ 2. Annual: alternate lobes of the calyx minute: fertile stamens 1 -2 :
anthers {by confluence) nearly 1-celled.—Aphanes, Linn.
3. A. arvensis (Seopoli): leaves pubescent, petioled, 3-parted; the segments
2-3-cleft; flowers axillary, glomerate. DC.—Scop. fl. Cam. l . p .
115 ; Pursh, l. c.; DC. ! 1. c. Aphanes arvensis, Linn. ! 1. c .; Fl. Ddn.
t. 973 ; Lam. ill. t. 87.
Virginia, in fields, -Clayton! probably introduced.—We have seen no
American specimens except those in the herbarium of Clayton. The two
following species of Mr. Nuttall are extremely near the present.
4. A. ocddentalis (Nutt.! mss.): “ somewhat hirsute; leaves smaller,
smoothish, petioled, 3-parted; the segments 2-3-cleft; flowers axillary,
clustered; calyx 4-cleft, with 4 intermediate teeth; the lobes acute and
much shorter than the tube. •
“ Rocky plains of the Oregon, towards the sea; common.—Closely allied
to A. arvensis, but a much smaller plant; the limb of the calyx shorter,
-with the intermediate teeth more conspicuous. The seed is also smaller and
paler.” Nuttall.
5. A. cuneifolia (Nutt.! mss.): “ somewhat hirsute; leaves cuneiform,
cleft and lobed at the summit only, 3-cleft; the segments short; flowers
axillary, clustered ; calyx 5-cleft, the intermediate teeth obsolete.
“ Dry plains, St. Barbara, California.—A slender species, with the leaves
much longer than broad. Segments of the calyx acute, with now and then
a rudimentary or solitary intermediate tooth.” Nuttall.
Subtribe 4. Cham.er.hobe.«.—Calyx campanulate or rather flat, valvate
in aestivation. Stamens 5—10. Carpels 5—10, or sometimes numerous, dry
(as well as the receptacle): styles lateral or terminal. Seed ascending or
suspended. Radicle superior.—Herbs or low suffrutescent plants.
17. SIBBALDIA. Linn, (partly); Ledeb. fl. Alt. 1. p. 480.
Calyx rather flat, 5-cleft and 5-bracteolate. Petals 5, linear-oblong,
minute. Stamens 5, alternate with the petals, inserted into the margin of
the villous disk which lines the base of the calyx : filaments short. Achenia
5-10, on very short hairy stipes : styles lateral: stigmas capitate, depressed.
Seed ascending, amphitropous. Radicle superior. — Procumbent or depressed
suffruticose plants, not glandular. Petals white or yellow.
The genus differs from Potentilla only in the fewer stamens and pistils, and
minute petals. r
l. S. procumbens (Linn.): leaves trifoliolate, on long petioles; leaflets
cuneiform, 3-toothed at the summit, glabrous above, pubescent beneath • petals
acute, shorter than the calyx (yellow)— Ensl. bot. t. 897 ; Fl Dan t
32 ; Pursh, fl. l.p . 211; DC.l. c.; Cham. $ ScElecht. in UnnJa 2 p i 8 ;
JnLOOK. ! L. c. *
Greenland ! Labrador ! Unalaschka ! and on the summits of the Rockv
Mountains, lat 52°-56°, Drummond ! Douglas ! to lat. 42° (near perpetutd
snow), Dr. James! Nuttall ! Also on the Mountains of Canada mid Vermont,
according to Pursh : but this is very doubtful.
18. CHAM®RHODOS. Bunge, in Ledeb. fl. Alt. l . p . 431.
Calyx campanulate, deeply 5-cleft, ebracteolate; the base lined with a
membranous disk, which is very densely bearded at the margin. Petals 5,
obovate. Stamens 5, opposite the petals! and inserted with them into the
sinuses of the calyx above the disk : filaments subulate, short, persistent.
Achenia 5-10 or more : styles, arising near the base of the ovaries, subulate.
Receptacle conical, villous. Seed ascending, nearly orthotropous. Radicle
superior.— Small erect and branching glandular-pubescent herbs; perennial
or biennial. Leaves many-cleft; the segments linear. Inflorescence di-
chotomously cymose. Petals white or purplish.
1. C. erecta (Bunge): stems slender, paniculately branched; radical
leaves rosulate, temately or biternately many-cleft; the segments very narrow,
obtuse ; the upper cauline ones 3-5-cleft; petals (white) longer than the
calyx; ovaries 5-20— Bunge, in Ledeb.! 1. c .; Hook. ! fl. Bor.-Am. 1.
p. 196. Sibbaldia erecta, L in n .; Lam. ill. t. 221, f. 2 ; D C .! vrodr. 2.
p. 587. • ‘
0. Nuttallii: flowers smaller; petals scarcely longer than the calyx.__C.
Nuttallii, Pickering! mss. Sibbaldia erecta 0. parviflora, Nutt ' aen 1'
p. 207. . - ■ ; ■ s
Rocky Mountains, lat. 52°-56°, Drummond! and on the Saskatchawan,
Richardson. 0. Missouri, near the Mandan villages, Nuttall ƒ__The plant
55