260 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
10. MOEHRINGIA. 
Petals longer than the obtusish sepals. .........-.-.--.------------ 1. M. lateriflora. 
Petals shorter than the acuminate sepals.............2...--------- 2. M. macrophylla. 
1. Moehringia lateriflora (L.) Fenzl, Verbr. Alsin. 18. 1833. 
Arenaria laterifolia Li. Sp. Pl. 1: 428. 1758. 
Type LOCALITY: Siberia. 
Rance: Oregon to Colorado and New Jersey, and northward. Asia. 
SPECIMENS EXAMINED: Mason County, Piper 1022; Rock Lake, Sandberg & Leiberg 123; 
Sprague, Henderson, May, 1892; Pullman, Hull 483; Piper, June, 1893; Walla Walla, 
Brandegee 671. 
ZONAL DISTRIBUTION: Transition. 
2. Moehringia macrophylla (Hook.) Torr. Bot. Wilkes Exped. 246. 1874. 
Arenaria macrophylla Hook. Fl. Bor. Am. 1: 102. 1880. 
Type cocaity: ‘North-West America, in shady woods.”’ Collected by Douglas. 
Range: British Columbia to California and eastward to Lake Superior. 
SPECIMENS EXAMINED: Clallam County, Elmer 2751; Tacoma, Flett 87; Mount Rai- 
nier, Piper 2128; upper Nisqually Valley, Allen 158; White Salmon, Suksdorf 250; Klicki- 
tat River, Flett 1356; Clealum, Whited 361; Nason Creek, Sandberg & Leiberg 627; without 
locality, Brandegee 670; Kamiak Butte, Moore 1705; Pend Oreille River, Lyall in 1861; 
Wawawai, Lake & Hull 784; Mount Carlton, Kreager 219; Cape Horn, Piper 5014. 
ZONAL DISTRIBUTION: Transition to Hudsonian. 
AMMODENTIA. 
1. Ammodenia peploides (L.) Rupr. Beitr. Pfl. Russ. Reich, 2: 25. 1845. 
Arenaria peploides L. Sp. Pl. 1: 423. 1753. 
Honkenya peploides Khrh. Beitr. 2: 181. 1788. 
Type LocaLity: Kuropean. 
Rance: On the seashore, Arctic regions, southward to Washington and New Jersey. 
Europe. Asia. 
SPECIMENS EXAMINED: Shoalwater Bay, Cooper in 1854; Bellingham Bay, Suksdorf 
1867; Ilwaco, Henderson 2156; Fidalgo Island, Lyall in 1858. 
ZONAL DISTRIBUTION: Humid Transition. 
la. Ammodenia peploides major (Hook.) 
Arenaria peploides major Hook. Fl. Bor. Am. 1: 102. 1830. 
Honkenya oblongifolia Torr. & Gr. Fl. 1: 176. 1888. 
Arenaria sitchensis Dietr. Syn. Pl. 2: 1565, 1839-52. 
Type Locaity: ‘‘De Fuca’s Straits.” Collected by Scouler. 
Rance: Alaska to Washington. 
SPECIMENS EXAMINED: Oyhut, Lamb 1248; Whidby Island, Gardner 45; near Seattle, 
Piper, July, 1897. 
ZONAL DISTRIBUTION: Humid Transition. 
ARENARIA. 
Valves of the capsule 2-toothed. 
Annual; leaves ovate... .......02222222-2.0.-2---2----2-- 202 1. A. serpyllifolia. 
Perennials; leaves very narrowly linear. 
Sepals obtuse; flowers in loose cymes ...-..---..---------- 2. A. capillaris. 
Sepals not obtuse. 
Petals longer than the ovate acute 3-nerved sepals. 
Flowers in dense clusters .................------- 3. A. congesta. 
Flowers in loose clusters ......-..-.-..---------- 4. A. glabrescens. 
