DICOTYLEDONOUS PLANTS 179 



small-, pale blue, funnel or salver form, downy within. Sta- 

 mens inserted above the middle of the tube, included. . Ovary 

 of 2 carpels, united at the top by the slender style ; stigma 

 globose, surrounded by a cup-shaped appendage. Fruit 2 

 slender, erect, many-seeded follicles ; seeds without tufts of 

 hairs.* 



1. A. tabernsemontana, Walt. Amsonia. Stem smooth and glar 

 brous, branched above, 2-3 ft. high. Leaves lanceolate, entire, 

 acuminate at the apex, acute at the base, smooth above, with a 

 bloom or slightly downy beneath, short-petioled. Flowers numer- 

 ous, on bracted pedicels. Corolla-tube slender, smooth or sometimes 

 downy above, the lobes narrow, as long as the tube. Follicles 

 slender, spreading, 4-6 in. long; seeds downy. Swamps and wet 

 ground S.* 



n. VINCA, L. 



Perennial herbs or small, slender shrubs ; juice not percep- 

 tibly milky. Leaves evergreen. Flowers solitary, white, 

 blue, or purple. Calyx 5-parted, lobes taper-pointed, glandu- 

 lar inside at the base. Corolla salver-shaped, thickened at 

 the throat, 6-lobed. Stamens 6, inserted on the upper or 

 middle part of the corolla-tube. Ovary of 2 carpels. Pods 

 2, slender, cylindrical, many-seeded. 



1. V. minor, L. Periwinkle. Stem slender, trailing, often root- 

 ing at the nodes, 1-3 ft. long. Leaves ovate, acute at the apex, 

 short-petioled, bright green. Flowers axillary, solitary, 1 in. wide. 

 Calyx with linear lobes nearly as long as the inflated tube of the 

 blue corolla. Matured pods slender, slightly divergent. Introduced 

 from Europe and common in gardens.* 



in. APOCYNUM, Toum. 



Perennial herbs ; stems with very tough bark, branched 

 above. Leaves opposite, entire. Flowers in terminal and 

 axillary bracted cymes. Calyx small, 5-parted, lobes acute. 

 Corolla bell-shaped, 6-lobed, with a small, scale-like append- 

 age at the base of each lobe. Stamens 6, distinct, inserted 

 on the base of the corolla-tube. Ovaries 2, distinct, united 

 by the styles ; stigma obtuse, 2-lobed. Pods long, slender, 

 many-seeded ; seeds with a tuft of hairs.* 



