154 KEY AND FLORA 



2. I. biflora Walt. WILD BALSAM, LADY'S SLIPPER, JEWELWEED, 

 SNAPWEED, KICKING COLT. Stem 2-4 ft. high, branching. Leaves 

 rhombic-ovate, 1-4 in. long. Peduncles about 1 in. long, generally 

 2-3-flowered. Flowers orange color, with many pretty, large, reddish- 

 brown spots. Sac longer than it is broad, ending in a recurved spur 

 about \ in. long. Damp, shaded ground, commoner than No. 1 and 

 usually blossoming earlier. 



62. RHAMNACE.. BUCKTHORN FAMILY 



Trees or shrubs. Leaves simple, often 3-5-nerved ; stipules 

 small. Flowers small, sometimes unisexual, green or yellow. 

 Calyx 4-5-lobed. Petals 4, 5, or absent, inserted on a disk at 

 the throat of the calyx, very small, hooded, usually with 

 claws. Stamens 4-5, inserted with the petals and opposite 

 them, often inclosed by the petals ; filaments awl-shaped ; 

 anthers small, versatile. Ovary 3-celled, 3-ovuled. 



I. BERCHEMIA Neck. 



Shrubs j stems twining or erect. Leaves alternate, promi- 

 nently pinnate-veined, stipules minute. Flowers in axillary 

 or terminal panicles, or rarely solitary. Calyx tube hemi- 

 spherical, 5-lobed. Petals 5, sessile, concave, as long as the 

 calyx. Ovary 2-celled, half inferior ; stigmas 2. Fruit an oval, 

 2-seeded drupe.* 



1. B. scandens Trel. SUPPLE JACK, RATTAN VINE. Woody, often 

 twining high; older bark yellowish, twigs purple, wood very tough. 

 Leaves ovate or oval, acute or obtuse, cuspidate at the apex, rounded 

 at the base, wavy on the margins, green above, pale beneath. 

 Flowers in small panicles. Fruit purple. In moist woods and along 

 streams S.* 



H. RHAMNUS L. 



Leaves alternate, deciduous. Flowers in small, axillary 

 cymes, often unisexual. Petals 4-5 or wanting. Stamens 4 

 or 5, very short. Drupe, 2-4-seeded. 



1. R. lanceolata Pursh. A tall shrub. Leaves with short petioles, 

 taper-pointed or somewhat obtuse, very variable in size, smooth or 

 nearly so above, more or less downy beneath, finely serrate. Flowers 



