MONOTEOPACEAE. 215 



2. P. americana Sweet. Plants 2-3 dm. tall: leaf -blades thickish, 2-5 cm. 

 long, mostly shorter than the petiole: sepals 2-3 mm. long: petals obovate to 

 orbicular-obovate, 7-9 mm. long: capsules 6-7 mm. wide. Common, in woods. 



3. P. chlorantha Sw. Plants mostly 1.5-3 dm. tall: leaf -blades suborbicular, 

 varying to oval or reniform, 1-2.5 cm. long, obtuse, undulate, or obscurely 

 toothed, mostly shorter than the petioles: sepals deltoid: petals suborbicular 

 to orbicular-obovate, 6.5-9 mm. long: anthers 2.5 mm. long: capsules 7-9 mm. 

 wide. Turkey Hill, along the Susquehanna. Limestones, schists. 



4. P. elliptica Nutt. Plant 1-3 dm. tall: leaf -blades thinnish, 3-9 cm. long, 

 mostly longer than the petiole: sepals triangular-ovate: petals oblong to 

 oblong-obovate, 5.5-7 mm. long : capsules 56 mm. wide. Common, in woods. 



2. CHIMAPHILA Pursh. Leaves with relatively narrow blades. Flowers 

 in corymbs. Filaments with pubescent or erose-ciliate appendages at the base. 

 Capsule erect, the valve-margins glabrous. Sum. PIPSISSEWA. 



Sepals longer than wide : petals ciliolate all around : filament-appendages pubescent. 



1. C. maculata. 

 Sepals wider than long : petals erose-ciliolate and jagged at the 



apex : filament-appendages erose-ciliate. 2. O. umbellata. 



1. 0. maculata (L.) Pursh. Plant 7-22' cm. tall: leaf -blades lanceolate or 

 sometimes broader, 2-5 cm. long, variegated: sepals rounded at the apex, 

 ciliolate : petals 10-12 mm. long : filament-appendages narrow. Common, in 

 woods. SPOTTED-WINTERGREEN. 



2. C. umbellata (L.) Nutt. Plant 9-32 cm. tall: leaf -blades oblanceolate, 

 cuneate, or obovate-cuneate, 2-10 cm. long, not variegated: sepals not rounded 

 at the apex, erose: petals 9-11 mm. long: filament -appendages broad. 

 Common, in woods. PRINCE 'S-PINE. 



FAMILY 2. MONOTROPACEAE. INDIAN-PIPE FAMILY. 



Saprophytic or humus herbs, with matted roots. Stems scape-like, 

 simple. Leaves reduced to scales. Flowers in racemes, or solitary, nod- 

 ding. Calyx of 2-6 deciduous sepals. Corolla white or colored, of 3-6 

 petals, or wanting. Androecium of 612 stamens : anthers with valves or 

 pores. Gynoecium of 4r-Q united carpels : stigma capitate, disc-like, or 

 funnelform. Fruit a ^6-valved loculicidal capsule. 



Flower solitary : anthers opening by 2 pores : plant white or pale pink, drying black. 



1. MONOTROPA. 

 Flowers several : anthers unequally valvate : plant yellowish or red. 2. HYPOPITYS. 



1. MONOTROPA L. White or pale-pink wax-like herbs. Flowers color- 

 less. Sepals 2-4, unequal. Petals 5 or 6, dilated at the apex. Gynoecium 

 glabrous. 



1. M. uniflora L. Plant 1-3 dm. tall, black when dry: sepals spatulate or ob- 

 long-spatulate, 10-16 mm. long: erose at the apex: petals 17-18 mm. long. 

 Common, in rich woods. Sum. INDIAN-PIPE. CORPSE-PLANT. 



2. HYPOPITYS Adans. Colored fragrant herbs. Flowers in a terminal 

 raceme, deep-pink, yellow, red, or crimson. Sepals and petals 5 each in the 

 earliest flower, 3 or 4 in the later ones. Gynoecium pubescent. Sum. and 

 fall. PINE-SAP. FALSE BEECH-DROPS. 



Stigma not retrorsely bearded: style sparingly pubescent: sepals and petals with 

 short cilia. . 1. H. americana. 



Stigma retrorsely bearded : style copiously pubescent : sepals 



and petals with long cilia. 2. H. lanuginosa. 



