WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 195 
5. Polygonum ramosissimum Michx. F1. Bor. Amer. 1: 237. 1803. 
TYPE Locaity: ‘Hab. in regione Illinoensi.”’ 
Rance: British America to California, eastward to the Atlantic Coast. 
New Mexico: Farmington; Dulce; Ojo Caliente; Santa Fe; Pecos; Frisco; Mangas 
Springs; Mesilla Valley; Tularosa Creek. Lower Sonoran to Transition Zone. 
A common weed of roadsides and waste ground, often occurring in cultivated fields. 
6. Polygonum sawatchense Small, Bull. Torrey Club 20: 213. 1893. 
TYPE Locatity: Sawatch Range, Colorado. 
Rance: Washington and North Dakota to New Mexico. 
New Mexico: Carrizo Mountains; Dulce; Stinking Lake; Sierra Grande; Grass 
Mountain; Gilmores Ranch. Meadows, in the Transition Zone. 
7. Polygonum douglasii Greene, Bull. Calif. Acad. 1: 125. 1885. 
Type Locauity: ‘From the Saskatchewan to British Columbia, and southward 
everywhere in the mountains to the borders of Mexico.”’ 
Rance: As under type locality. 
New Mexico: Tunitcha Mountains; Chama; Ramah; Cross L Ranch; Luna; Burro 
Mountains; West Fork of the Gila; Mimbres River; White Mountains. Transition 
Zone. 
This is the western equivalent of Polygonum tenue of the Eastern States and is 
separated from that species by two characters which are not readily apparent. The 
ripe fruit is deflexed, but much of the ordinary herbarium material fails to show the 
character because the plants are too young. The other character is generally more 
certainly present though harder to make out. P. tenue has three parallel veins in the 
leaf, while P. douglasii has only a midvein. Our plant occurs in forests at middle 
altitudesin the mountains. It is closely related to the next species as well. 
8. Polygonum montanum (Small) Greene, Pl. Baker. 3: 13. 1901. 
Polygonum tenue latifolium Engelm. Proc. Acad. Phila. 1863: 75. 1864. 
Polygonum douglasii latifolium Greene, Bull. Calif. Acad. 1: 125. 1885. 
Polygonum douglasii montanum Small, Mem. Bot. Columb. Coll. 1: 118. 1895. 
Type Locauity: Rocky Mountains of Colorado. 
Rance: New Mexico and Arizona to California and northward in the higher 
mountains. 
New Mexico: Upper Pecos River; Beattys Cabin. Canadian Zone. 
6. PERSICARIA Adans. SmMARTWEED. 
Annual or perennial herbs; leaves alternate, the blades entire; ocrez cylindric, 
membranous, naked or fringed with bristles; flowers in terminal or axillary spikelike 
racemes; calyx white, greenish, or rose-colored, persistent in fruit; sepals mostly 5; 
stamens 4 to 8, the filaments not dilated; achenes lenticular or trigonous, usually 
black. 
KEY TO THE SPECIES. 
Racemes terminal only, usually solitary. 
Leaves elliptic, obtuse or acute; spikes 12 to 24 mm. lone 
pedicels glabrous...........---------- wees . Ll. P. amphibia. 
Leaves lanceolate to ovate, acuminate; ; spikes 30 1 mm. long « or 
more; pedicels hispid, often glandular we eeeeeceeeeeeees 2. P. muhlenbergii. 
Racemes axillary as well as terminal, numerous. 
Sheaths without marginal bristles. 
Styles included...............2.0...-2-000020 002 e eee eee 3. P. lapathifolia. 
Styles conspicuously exserted...................-------. 4. P. longistyla. 
