238 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. SAGINA L. Pearlwort. 



Low herbs, 4 cm. high or less; leaves awl-shaped; flowers small, terminating the 

 stems or branches; sepals 4 or 5; petals 4 or 5, not divided, often wanting; capsule 4 

 or 5-valved. 



1. Sagina saginoides (L.) Britton, Mem. Torrey Club 5: 151. 1894. 

 Spergula saginoides L. Sp. PI. 441. 1753. 

 Sagina linnaei Presl, Rel. Haenk. 2: 14. 1835. 

 Alsinella saginoides Greene, Fl. Franc. 125. 1891. 

 Type locality: "Habitat in Gallia, Sibiria." 



Range: Greenland and Alaska to New Mexico; also in the Old World. 

 New Mexico: Winsors Ranch; Chama. Damp meadows, in the Transition Zone. 



6. MOEHRINGIA L. 



Weak stoloniferous perennials with few axillary or terminal, small, white flowers; 

 ovary at first 3-celled; seeds few, smooth, appendaged at the hilum; leaves lanceolate 

 to oval. 



key to the sppxjies. 



Petals longer than the obtuse sepals; leaves elliptic-oblong to oval, 



mostly obtuse; stems terete 1. M. lateriflora. 



Petals shorter than the acute or acuminate sepals; leaves lanceo- 

 late, acute; stems angled 2. M. macrophylla. 



1. Moehringia lateriflora (L.) Fenzl, Versuch Alsin. 18. 1833. 

 Arenaria lateriflora L. Sp. PI. 423. 1753. 



Type locality: "Habitat in Sibiria." 



Range: British America to New Jersey, Utah, and New Mexico; also in Asia. 

 New Mexico: Winsors Ranch; Tierra Amarilla. Damp woods, in the Transition 

 Zone. 



2. Moehringia macrophylla (Hook.) Torr. in Wilkes, U. S. Expl. Exped. 15: 246. 



1874. 

 Arenaria macrophylla Hook. Fl. Bor. Amer. 1: 102. 1830. 

 Type locality: "North- West America, in shady woods." 

 Range: British America to Vermont, New Mexico, and California. 

 New Mexico: Santa Fe Canyon (Heller 3690). Damp woods, in the Transition 

 Zone. 



7. ARENARIA L. Sandwort. 



Slender annuals or perennials with more or less diffusely branched stems; leaves 

 flat to subulate; flowers in open or capitate cymes or solitary in the axils; sepals 5, 

 often ribbed; petals 5, white, entire or rarely notched; stamens normally 10; styles 3; 

 capsule globose to oblong, opening by twice as many valves as there are styles. 



KEY TO THE SPECIES. 



Leaves narrowly linear, more or less rigid or pungent. 



Plants glabrous; cymes open, many-flowered 1 . A. eastwoodiae. 



Plants glandular, at least on the pedicels; cymes various. 



Calyx and pedicels densely glandular; lower leaves 50 to 



100 mm. long, erect or ascending 2. A. fendleri. 



Clayx glabrous, the pedicels only slightly glandular; 



lower leaves 15 mm. long or less, mostly divergent. 3. A. aculeata. 



