CA R YOPH YLLA CEA E. 40 1 



sharp -pointed, densely imbricated, glabrous, 1-2.5 cm. long ; flowering stems finely 

 pubescent ; bracts lanceolate-subulate, the margins ciliolate ; cyme 1.53.5 cm. 

 broad, its rays short and pubescent ; sepals lanceolate-subulate, pubescent, shorter 

 than the similar bracts and about one-half the length of the petals. In dry or 

 rocky soil, Neb. and Colo, to Mont, and Idaho. June- Aug. 



4. Arenaria Fendleri A. Gray. FENDLER'S SANDWORT. (I. F. f. 1502.) 

 Perennial by a woody root, pale green, glandular-pubescent above ; stems tufted, 

 erect, very slender, 1-4 dm. tall, the internodes 2-5 cm. long. Lower leaves 

 subulate or setaceous, glabrous or minutely ciliate, 2-10 cm. long, about 0.5 mm. 

 wide, the upper somewhat connate at the base ; cyme loose, its rays filiform, 

 several-flowered; pedicels very glandular; flowers 8-12 mm. broad; sepals linear- 

 lanceolate, acuminate, nearly as long as the obovate petals ; capsule rather shorter 

 than the sepals. In dry, usually rocky soil, Neb., and Wyo. to Utah, N. Mex. and 

 Cal. June -Aug. 



5. Arenaria biflora (L.) S. Wats. ARCTIC SANDWORT. (I. F. f. 1503.) 

 Perennial, tufted, glandular-pubescent, 2-5 cm. high. Leaves linear or linear-lan- 

 ceolate, sessile and sheathing, densely imbricated, 6-8 mm. long, semiterete, obtuse, 

 glabrous, ciiiateor glandular-pubescent; peduncles i-2-flowered; flowers 10-16 mm. 

 broad ; sepals linear-oblong, 3 -nerved, obtusish ; petals obovate, twice as long as 

 the -calyx ; capsule slightly longer than the sepals ; seeds smooth. Greenland and 

 Lab. to Quebec and Alaska, south in the Rocky Mts. to Ariz. Also in Asia. 

 Summer. 



6. Arenaria verna L. VERNAL SANDWORT. (I. F. f. 1504.) Perennial, 

 tufted; flowering stems 2-13 cm. high. Leaves subulate-linear, rather rigid, im- 

 bricated below, more distant above, 4-8 mm. long ; the upper a little shorter and 

 broader than the lower ; flowers 4-6 mm. broad, numerous in loose cymes ; sepals 

 lanceolate, acuminate, 3 -ribbed ; capsule 3-valved, exceeding the sepals ; seeds 

 rugose. In rocky places, Smuggler's Notch, Vt. ; Mt. Albert, Quebec; Lab. and 

 arctic America. Also in northern and alpine Europe and Asia. Summer. 



7. Arenaria Caro.iniana Walt. PINE-BARREN SANDWORT. (I. F. f. 1505.) 

 Perennial from a deep root, tufted, glandular-pubescent; flowering stems 12.5 ^m. 

 high. Lower leaves subulate, rigid, 4-6 mm. long, keeled by the prominent mid- 

 rib, densely imbricated; upper leaves similar, distant; cymes few-flowered; flowers 

 10 -16 mm. broad; sepals ovate-oblong, obtuse, nerveless; petals oblanceolate, 

 3-4 times as long as the calyx ; pod short-ovoid, twice as long as the calyx, 

 3-valved; seeds nearly smooth. In dry sand, southeastern N. Y., pine barrens of 

 N. J., south near the coast to Fla. and Ga. May-July. 



8. Arenaria Michauxii (Fenzl.) Hook. f. ROCK SANDWORT. (I. F. f. 1506.) 

 Perennial, tufted, slender, glabrous, dark green, 1.5-4 dm. high. Leaves slender, 

 rigid, subulate or filiform, broadest at the sessile base, 8-20 mm. long, distinctly 

 I -ribbed, spreading, with numerous others fascicled in the axils; flowers 8-10 mm. 

 broad ; calyx ovoid-oblong in fruit ; sepals lanceolate or ovate-lanceolate, acute, 

 3 -ribbed, about half the length of the petals and slightly shorter than the ovoid 

 pod; seeds minutely rugose. In dry, rocky places, Ont. and Vt. to Va., Minn., 

 S. Dak. and Mo. [A. stricta Michx. ; not A. stricta (Sw.) S. Wats.] June -July. 



9. Arenaria Texana (Robinson) Britton. TEXAS SANDWORT. (I. F. f. 1507.) 

 Similar to the preceding, but lower, stiffer, pale green : stems erect, 1-2 dm. tall, 

 thickened at the nodes, the internodes mostly short. Leaves subulate, stiff, 

 6-12 mm. long, connate, with numerous minute or similar ones fascicled in their 

 axils ; cymes small, rather few-flowered ; calyx narrowly conic in fruit ; sepals 

 narrowly lanceolate, strongly 3-ribbed, long-acuminate, 4 mm. long, longer than 

 the capsule. In dry rocky soil, Kans. and Mo. to Tex. June-July. 



10. Arenaria patula Michx. PITCHER'S SANDWORT. (I. F. f. 1508.) An- 

 nual, branched from the base, slender or even filiform, 1-2.5 dm. high- Leaves 

 soft, linear-filiform, 8-25 mm. long, I mm. wide or less ; cyme several-flowered, 

 diffuse ; sepals lanceolate, acuminate, 3~5-nerved, about half the length of the 

 emarginate petals and equalling the pod ; seeds rou^h. In open dry places, Ky. 

 to 111., Minn., Kans., Ala., Tenn. and Tex. April-May. 



11. Arenaria Groenlandica (Retz) Spreng. MOUNTAIN SANDWORT OR STAR-' 

 WORT. (I. F. f. 1509.) Perennial from a slender rootstock, tufted, glabrous ; 

 flowering stems slender, 5-13 cm. high -, leaves linear-filiform, the upper distant, 



