CARYOl'IIYLLACEAE. 



[VOL. II. 



Sagina decumbens (Ell.) T. & G. Decumbent Pearhvort. (Fig. 1496.) 



Sp.'roidii dttiimbens Ell. Bot. S. C. & Ga. i: 523. 1817. 



Snx'iiia tiecitmbfiisT. &. G. Fl. N. A. i: 177. i - 



Sagina subttlata T. & G. Fl. N. A. 1:17*. iS.^s. Not Presl, 1826. 



Annual, tufted, stems decumbent or ascending, 2 / -4 / long, gla- 

 brous or minutely glandular-pubescent above. Leaves narrowly 

 linear, sometimes bristle-tipped, $"-$" long; peduncles filiform, 

 3 // -i5 // long; flowers \"-\y 2 " broad; sepals, petals and styles 5; 

 stamens 5 or 10; petals equalling or shorter than the calyx; pod 

 ovoid-oblong, nearly twice as long as the calyx; sepals acutish or 

 obtuse. 



In dry soil, eastern Massachusetts to Illinois, south to Florida, Mi- 

 souri and Louisiana. March-May. 



Sagina decumbens Smithii (A. Gray) S. Wats. Bibl. Index, i: 105. 1878. 

 Sagina subiilata var. Sinitliii A. Gray, Man. Kd. 5, 95. i- 



Slender, stems erect or nearly so; flowers apetalous. Plant with the 

 aspect of S. apetala, but the parts of the flower in s's. Southeastern 

 Pennsylvania and southern Now Jersey. 



4. Sagina saginoides (L,.) Britten. Arctic 

 Pearhvort. (Fig. 1497.) 



1894. 



saginonti v I.. Sp. PI. 441. 1753. 

 Sa.ifina Linnaei Presl, Rel. Haenk. 2: 14. 

 Sagina saginoides Britton, Mem. Torr. Club, 5: 151. 



Perennial, glabrous, tufted, i'-4' high, few-flowered or 

 the flowers solitary at the ends of the stems. Leaves 

 linear-subulate, or filiform, 2 // -5 // long, acuminate or mu- 

 cronate; flowers i^ // -2 i j4 // broad; sepals, petals and styles 

 5; stamens 10; sepals oval, obtuse, half the length of the 

 ovoid-oblong capsule. 



On rocks, Labrador, Anticosti and in arctic America. 

 in the higher Rocky Mountains, south to Colorado and I'tah, 

 and in California. Also in alpine and arctic Kurope and Asia. 

 Summer. 



JL 



Sagina noddsa (L,. ) Fenzl. Knotted Pearl- 

 wort. (Fig. 1498.) 



'(i mntusa L Sp. PI. 440. 1753. 

 MOi/owf l-Vn/.l. Vetlir. Al-in. !-. 1833. 



Perennial, tufted, erect or decumbent, 2 / -6 / high, stems 

 sparingly branched, slender, glabrous, or slightly glandular- 

 pubescent above. Lower leaves linear, teretish, 4 // -8 // long, 

 mucronulate, the upper shorter and with clusters of minute 

 ones iu their axils; flowers few, about 3" broad, terminating 

 the stem and branches; sepals, petals and styles 5; stamens 

 10; peduncles 3 // -8 // long; sepals ovate-oblong, obtuse, i" 

 long; petals obovate, longer than the calyx, as is also the 

 ovoid pod. 



In wet, sandy places, coast of New Hampshire and Maine ^to 

 reenland; 

 Arctic Sea. 



Greenland; shores of Lake Superior, Lake Winnipeg and of the 

 . Also in northern Kurope and Asia. Summer. 



15. ARENARIA L. Sp. PI. 423. 1753. 

 [ALSINE Wahl. Fl. Lapp. 127. 1812. Not L. I753-] 



Annual or perennial, mainly tufted herbs, with sessile leaves, and terminal cymose or 

 capitate, rarely axillary and solitary, white flowers. Sepals 5. Petals 5, entire or scarcely 

 emarginate, rarely none. Stamens 10. Styles generally 3 (rarely 2-5). Ovary i-celled, 

 many-ovuled. Capsule globose or oblong, dehiscent at the apex by as many valves or teeth 

 as there are styles, or twice as many. Seeds reniform-globose or compressed. [Latin, sand, 

 in allusion to the habitat of many species.] 



About 150 species, of wide geographic distribution; not common in tropical regions. 



