260 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



10. MOEHRINGIA. 



Petals longer than the obtusish sepals 1. M. lateriflora. 



Petals shorter than the acuminate sepals 2. M. macrovhylla. 



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

 Areruir'ia latcrifolia L. Sp. PI. 1: 423. 1753. 



Type locality: Siberia. 



Range: Oregon to Colorado and New Jersey, and northward. Asia. 



Specimens examined: Mason County, Pipe'' 1022; Hock Lake, Sandberg c& Leiherg 12S; 

 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. 

 Arenarla niunophi/Ua Hook. Fl. Bor. Am. 1: 102. 1830. 



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



Range: British Columbia to California and eastward to Lake Superior. 



Specimens examined: Clallam County, Ehner 2751; Tacoma, Flett 87; Mount Rai- 

 nier, Piper 2128; upper Nisqually Valley, Allen 158; White Salmon, Sulcsdorf 250; Klicki- 

 tat River, FZe« 1356; Clealum, FAi/eJ 361 ; ^ason Creek, Sandberg <& Leiberg 627; without 

 loc&lity, Brandegee 670; Kamiak Butte, if core 1705; Pend Oreille River, iyaZZ in 1861; 

 Wawawai, Lal'c <& Hull 784; Mount Carlton, Kreager 219; Cape Horn, Piper 5014. 



Zonal dlstribution : Transition to Hudsonian. 



AMMODENIA. 



1. Ammodenia peploides (L.) Rupr. Beitr. Pfl. Ru.ss. Reich. 2: 25. 1845. 



Arenaria peploides L. Sp. PI. 1: 423. 1753. 



Honkenya peploides Ehrh. Beitr. 2: 181. 1788. 



Type locality: European. 



Range: 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. 1838. 



Arenaria sitchensis Dietr. Syn. PI. 2: 1565. 1839-52. 



Type locality: "De Fuca's Straits." Collected by Scouler. 



Range: Alaska to Washington. 



Specimens examined: Oyhut, Lamb 1248; Whidby ".slaiid, Gardner 45; near Seattle, 

 Piper, July, 1897. 



Zonal distribution: Humid Transition. 



ARENARIA. 



Valves of the capsule 2-toothed. 



Annual; leaves ovate 1-^4. serpyllifdia. 



Perennials; leaves very narrowly linear. 



Sepals obtuse; flowers in loose cymes 2. .4. capillar is. 



Sepals not obtuse. 



Petals longer tlum the ovate acute 3-nerved sepals. 



Floweis in dense clu.sters 3. A. congesta. 



Flowers in loose clusters 4. .4. glabrescens. 



