178 FOUNDATIONS OF BOTANY 



Corolla tubular-bell-shaped, 4-lobed. Stamens short, inserted 

 at the notches of the corolla. Style short ; stigma 2-lipped. 

 Capsule ovoid, more or less 2-4-celled ; seeds very minute 

 and numerous. 



1. 0. virginica, L. PENNYWORT. Stem 3-8 in. high, often several 

 from the same root. Leaves somewhat fleshy, wedge-obovate or 

 somewhat diamond-shaped, often truncate, sessile. Flowers oppo- 

 site or terminal in threes, nearly sessile. Corolla pale purple or 

 nearly white. Rich woodlands, among dead leaves. 



H. MENYANTHES, Tourn. 



Perennial, scape-bearing marsh herbs. Rootstock creeping. 

 Leaves of 3 leaflets. Flowers racemed. Calyx 5-parted. 

 Corolla fleshy, funnel-shaped, the limb 5-parted. Stamens 5, 

 inserted on the corolla-tube. Disk of 5 hypogynous glands. 

 Ovary 1-celled ; style thread-shaped ; stigma 2-lobed. Capsule 

 globose, many-seeded. 



1. M. trifoliata, L. BUCK-BEAN, MARSH TREFOIL. Rootstocks 

 stout and matted. Leaflets obtuse, entire. Flowers f in. in diam- 

 eter, white or pinkish. Bogs, especially IS". 



80. APOCYNACE^. DOGBANE FAMILY. 



Trees, shrubs, or herbs, with milky juice, often climbing. 

 Leaves usually opposite, rarely whoiied; entire, nearly or 

 quite without stipules. Flowers regular, solitary, or in cymes. 

 Calyx 4-5-cleft. Corolla hypogynous, funnel-, salver-, or bell- 

 shaped, sometimes with scales in the throat. Stamens, 4-5, 

 borne on the corolla-tube or throat; filaments very short; 

 anthers somewhat attached to the stigma. Ovary of 2 car- 

 pels, free or somewhat united ; style short ; stigma entire 

 or 2-cleft. Fruit of 2 many-seeded pods (in the genera here 

 described). 



I. AMSONIA, Walt. 



Perennial herbs ; stem erect, branched. Leaves alternate. 

 Flowers in terminal panicles. Calyx small, 5-parted. Corolla 



