486 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Order 39. ERICALES. 
KEY TO THE FAMILIES. 
Gyneecium inferior; fruit baccate or drupaceous. ......- 108. VACCINIACEAE (p. 489). 
Gynececium superior; fruit usually capsular. 
Herbaceoussaprophy tes without green leaves. . . -. 105. MONOTROPACEAE 
(p. 486). 
Herbs or shrubs with green leaves. 
Corolla of essentially distinct petals; herbs. ...106. PYROLACEAE (p. 486). 
Corolla of more or less united petals; shrubs..107. ERICACEAE (p. 488). 
105. MONOTROPACEAE. Indian pipe Family. 
Fleshy herbs with pale reddish stems destitute of chlorophyll, parasitic or sapro- 
phytic, the leaves reduced to scales; flowers similar to those of the Pyrolaceae, in en- 
larged racemes, 
KEY TO THE GENERA. 
Petals united, persistent; plants glandular, dark purplish 
red when growing........-...---.2--2----.-.-00---- | 1. Prerospora (p. 486). 
Petals distinct, deciduous; plants glabrous or slightly pubes- 
cent above, not glandular, bright red when growing. 2. Hyporrrys (p. 486), 
1. PTEROSPORA Nutt. Pineprops. 
Stems tall, 30 to 50 cm. high, slightly woody on drying, solitary, from a thick base; 
calyx deeply 5-parted; corolla globular, urceolate; stamens 10; disk none; stigma 5- 
lobed; capsule depressed-globose, 5-lobed; seeds numerous, broadly winged at the 
apex. 
1. Pterospora andromedea Nutt. Gen. Pl. 1: 269. 1818. 
Type Locaity: “In Upper Canada near the Falls of Niagara.’’ 
Rance: British America to California, New Mexico, and Pennsylvania. 
New Mexico: Tunitcha Mountains; Winsor Creek; Sandia Mountains; Gallinas 
Planting Station; Mogollon Creek; Sawyers Peak. Transition Zone. 
2. HYPOPITYS Hill. Pinesap. 
Stems thick and fleshy, 20 cm. high or less, usually several in a cluster; sepals and 
petals 3 to 5, the latter saccate at the-base; anthers reniform, the cells completely con- 
fluent into one, opening by very unequal valves; stigma glandular on the margins. 
1. Hypopitys latisquama Rydb. Bull. Torrey Club 40: 461. 1913. 
TYPE LocaLity: Bridger Mountains, Montana. 
Rance: British Columbia and Montana to California and Mexico. 
New Mexico: Tunitcha Mountains; Sandia Mountains; Santa Fe and Las Vegas 
mountains; Middle Fork of the Gila; Black Range; White and Sacramento moun- 
tains. Damp woods, in the Canadian and Hudsonian zones. 
106. PYROLACEAE. Wintergreen Family. 
Low perennial herbs with simple petiolate leaves and perfect solitary, racemose, 
or corymbose flowers; calyx 4 or 5-merous; corolla of 5 distinct or slightly united 
petals; stamens twice as many as the petals; anthers opening introrsely by pores or 
short slits, inverted in anthesis; ovary superior; style often declined; fruit a capsule 
.with numerous seeds. 
