488 CONTEIBUTIONS PROM THE NATIONAL HERBAEIUM. 



4. Pyrola chlorantha Swartz, Svensk. Vet. Akad. Handl. 1810: 190. pi. 6. 1810. 

 Type locality: Carlsberg near Stockholm, Sweden. 



Range: British America to Oregon, New Mexico, Nebraska, and Virginia. 

 New Mexico: Tunitcha Mountains; Sandia Mountains; Santa Fe and Las Vegas 

 mountains. Deep woods, in the Canadian and Hudsonian zones. 



5. Pyrola eUiptica Nutt. Gen. PI. 1: 273. 1818. Shinleaf. 

 Type locality: "Common around Philadelphia, and in the woods of New Jersey." 

 Range: British America to New Mexico, Illinois, and Maryland. 



New Mexico: Gallinas Planting Station; West Fork of the Gila. Damp woqds, in 

 the Transition and Canadian zones. 



3. MONESES Salisb. One-flowered wintergreen. 



Similar to Pyrola, but the 5 pure white petals widely spreading, orbicular; filaments 

 subulate, naked, the anthers conspicuously 2-horned; style straight, exserted; stigma 

 large, peltate, with 5 radiating lobes; valves of the capsule naked; scapes 1-flowered. 



1. Moneses iiniflora (L.) A. Gray, Man. 273. 1848. 



Pyrola uniflora L. Sp. PI. 397. 1753. 



Type locality: "Habitat in Europae borealis silvis." 



Range: British America to Oregon, New Mexico, and Pennsylvania. 



New Mexico: Top of Las Vegas Range; Rio Pecos near Truchas Peak. Deep 

 woods, in the Hudsonian Zone. 



107. ERICACEAE. Heath Family. 



Shrubs or trees-with scaly buds and simple alternate exstipulate leaves, usually 

 evergreen; flowers perfect, 4 or 5-merous, in small axillary or terminal clusters; corolla 

 urceolate or globular, 4 or 5-toothed, deciduous; stamens twice as many as the corolla 

 lobes, included, the anthers dehiscent by terminal pores or chinks; fruit fleshy, drupa- 

 .ceous or berry-Uke. 



KEY to the genera. 



Ovary 5-celled, ripening into a granular-coated berry 



with many seeds and a firm endocarp ; trees... 1. Arbutus (p. 488). • 



Ovary 4 to 10-celled, with solitary o\ailes, in fruit be- 

 coming a drupe with as many seedlike nutlets, 

 or a solid stone; low shrubs, one of them pros- 

 trate 2. Arctostaphylos (p. 489). 



1. ARBUTUS L. 



Good-sized trees with exfoliating bark; leaves cA^ergreen, coriaceous, alternate, 

 petiolate; flowers small, white or flesh-colored, in a terminal cluster of racemes or 

 panicles; calyx small, 5-parted; corolla globular to ovoid; o^oiles crowded on a fleshy 

 placenta projecting from the inner angle of each cell; styles long, the stigmas obtuse. 



KEY TO the species. 



Leaves elUptic-lanceolate, acute, glabrous 1. A. arizonica. 



Leaves oblong or ovate, obtuse, permanently pubescent beneath 2. A. texana. 



1. Arbutus arizonica (A. Gray) Sarg. Gard. & Por. 4: 317. 1891. 

 Arbutus xalapensis arizonica A. Gray, Syn. Fl. ed. 2. 2': 396. 1886. 

 Type locality: Mountains of southern Arizona. 

 Pt.\NGE: Southern New Mexico and Arizona and adjacent Mexico. 

 New Mexico: San Luis Mountains; Animas Peak. Low mountains. 



