292 PROCEEDINGS OF THE AMERICAN ACADEMY. 
* Leaves ovate, elliptic or linear, not acerose. 
+ Annuals. 
A. SERPYLLIFOLIA, L. (THyME-LEAveD SANDWorRT.) Aunual, 
finely pubescent, much branched: leaves very short, 2-3} lines in 
length, ovate, acute or acuminate, rather distinctly 3-5-nerved, rounded 
at the base; the lowest only being narrowed to a short petiole: flowers 
numerous in open leafy cymes; pedicels 1-3 times the length of the 
ovate-lanceolate acuminate hispidulous sepals: petals small, about two 
thirds the length of the sepals: capsule flask-shaped. — Spec. 429; 
Michx. Fl. i. 274; Ell. Sk. i. 518; Torr. & Gray, Fl. i. 182.— 
Sandy soil, Lower Canada and New England to Florida and to Oregon, 
Washington, and British Columbia. (Nat. from Europe.) 
Var. Tenuior, Koch. More delicate: leaves reduced: flowers 
smaller in a nearly naked racemose panicle: capsule more oblong.— 
Synop. 117. A. leptoclados, Guss. Fl. Sic. Syn. iii. 824. — Portland, 
Oregon, Brandegee. Suksdorf’s specimens from McCloud Lake are 
somewhat similar. ( Europe.) 
A. Benthamii, Fenzt in herb. A slender annual, branched 
from the base; branches finely pubescent in lines: leaves short, 3-4 
lines in length, elliptic-lanceolate, acute and apiculate, often punctate, 
narrowed to a sessile base, or the lowest to short ciliated petioles: 
floral leaves much reduced: pedicels filiform, many times exceeding 
the ovate acuminate glabrous often punctate sepals: seeds dark 
brown, minutely tuberculate. — Torr. & Gray, Fl. i. 679 ; Gray, Pl. 
Wright. ii. 18; Torr. Bot. Mex. Bound. 36. A. monticola, Buckley, 
Proc. Acad. Philad. 1861, 449. — Rocky ground, Texas, Drummond, 
Wright, Thurber, Hall, Reverchon ; New Mexico, Thurber. 
+ + Perennials. 
A. ciliata, L. Minutely glandular-puberulent: stems numerous 
slender, terete, leafy, densely matted, or in less exposed situations : 
spreading and ascending, 1-5 inches long, terminally 1-3-flowered | 
leaves small, ovate-oblong or lance-oblong, scarcely acute, 1-3 lines 
in length, distinctly ciliate near the cuneate base: peduncles oy 
2-5 lines long: sepals ovate-oblong, obtuse, nerved, 14-14 lines long f 
petals of similar shape and equal length: stamens 8-10: valves ng 
the capsule rather deeply bifid exceeding the calyx.— Spee. saa 
DC. Prodr. i. 411; Fenzl in Ledeb. FI. Ross. i. 370. (High mou 
tains and arctic regions of Europe.) : Is 
Var. (?) humifusa, Hornem. Leaves without ciliation: s°P* 
nerveless. — Hornem. ex Lange, Pl. Groen. 132. A. Norcegith 
Gunn, Fl. Norv. ii. 145, t. ix. £ 7-9. A. humifusa, Wablb. Fl. 18 
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