486 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Order 39. ERIC ALES. 



KEY TO THE FAMILIES. 



Gynoecium inferior; fruit baccate or drupaceous 108. VACCINIACEAE (p. 489). 



Gyncecium superior; fruit usually capsular. 



Herbaceous saprophytes 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 1. Pterospora (p. 486). 



Petals distinct, deciduous; plants glabrous or slightly pubes- 

 cent above, not glandular, bright red when growing. 2. Hypopitys (p. 486). 



1. PTEROSPORA Nutt. Pinedrops. 



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. PI. 1: 269. ISIS. 

 Type locality: "In Upper Canada near the Falls of Niagara." 

 Range: 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. 



- fitQ,l0-6refX~> 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 complete^ con- 

 fluent into one, opening by very unequal valves; stigma glandular on Ihe margins. 



1. Hypopitys latisquama Rydb. Bull. Torrey Club 40: 461. 1913. 



Type locality: Bridger Mountains, Montana. 



Range: 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. 



