LEADWORT FAMILY. 271 



P. rotundif&lia, Linn. Damp or sandy woods ; has thick and shining 

 round leaves on short petioles, many-flowered raceme, and blunt anthers ; 

 a variety in bogs has rose-purple flowers. Very variable in shape of leaves. 



19. MONOTROPA, INDIAN PIPE. (Name from the Greek, refers 

 to the flower or summit of the stem turned over to one side or hanging ; 

 in fruit it straightens.) Flowers summer. Parasitic on the roots of trees. 



M. unifldra, Linn. COMMON INDIAN PIPE or CORPSE PLANT. Rich 

 woods ; smooth, waxy -white all over (turning black in drying) , 3'-6' 

 high, with one rather large nodding flower of 5 petals and 10 stamens. 



M. Hypdpitys, Linn. PINESAP or FALSE BEECH DROPS. In Oak 

 and Pine woods; rather downy, tawny or reddish, fragrant, 4'-12' high, 

 with several smallish flowers in a scaly raceme, having 4 petals and 8 

 stamens, or the uppermost 5 petals and 10 stamens. 



LXV. DIAPENSIACKE, DIAPENSIA FAMILY. 



Low and prostrate or tufted plants, herbaceous or soft-woody, 

 glabrous or nearly so; leaves small and simple, without sti- 

 pules ; flowers regular, all the parts in 5's, except the ovary, 

 which is 3-celled and with a single 3-lobed style ; stamens ad- 

 nate to the corolla and sometimes united together, and those 

 opposite the lobes of the corolla (if any) reduced to staminodia. 



1. PYXIDANTHEKA. Staminodia absent. Flowers solitary and sessile on short, leafy 



branchlets. Calyx conspicuously bracteate. 



2. GALAX. Staminodia present. Flowers in a narrow spike on a slender, naked scape. 



Calyx minutely 2-bracteolate. 



1. FYXID ANTHER A. (Greek: small 6ox, anther.} 24 



P. barbulata, Michx. PIXY, FLOWERING Moss. A handsome, trail- 

 ing little plant in the sandy pine barrens of N. J. and S., flowering in 

 early spring ; leaves small and linear-oblanceolate, sharp-pointed ; flowers 

 (appearing as if clustered, from the shortness of the branchlets) very 

 numerous, white or blush ; anther cells awn-pointed at the base, opening 

 by a transverse line. 



2. GALAX. (Greek : milk, of no application.) 1L 



G. aphylla, Linn. Leaves Pyrola-like, round-heart-shaped and cre- 

 nate, tufted from scaly creeping rootstocks ; scape l-2, bearing a wand- 

 like raceme or spike of small white flowers ; in open woods, Va., S. 



LXVI. PLTJMBAGINACEJ1, LEADWORT FAMILY. 



Known by the flowers with parts five throughout, viz. 5- 

 lobed plaited calyx, 5 stamens opposite as many petals or lobes 

 of the corolla and almost separate from them, 5 styles or 5 

 stigmas, and the free ovary 1-celled, containing a single ovule 

 hanging on a slender stalk which rises from its base ; the fruit 

 a small utricle. 



