70 KEY TO PLANTS. 
53 (a) Leaves alternate. Undershrubs, shrubs, 
or trees. Flowers solitary .or spicate or 
racemose. Seeds hairy. Europe, Asia, 
Africa. Tamariscinede. 
(2) Leaves opposite. Flowers solitary or 
cymose. Seeds exalbuminous. 
Hy pericineae. 
54 (@) Ovaries several, distinct or connate at the 
2) base only, with wholly distinct styles 
and stigmas. 55. 
(0) Ovaries several, with connate styles or 
stigmas, or ovary 1. 69. 
55 (a) Petals and stamens perigynous. 56. 
(0) Petals and stamens hypogynous. 59. 
56 (a) Sepals, petals, and stamens arranged in a 
spiral manner. Anthers extrorse. Shrubs. 
Leaves opposite, undivided, exstipulate. 
Receptacle (calyx-tube) urceolate. Fruits 
indehiscent. Seeds exalbuminous. North 
America. Calycanthaceae. 
(6) Sepals, petals, and stamens arranged in 
whorls. Anthers introrse. 57. 
57 (a) Leaves stipulate, alternate. Odd calyx- 
lobe posterior. Rosaceae. 
(0) Leaves exstipulate. 58. 
58 (a) Leaves compound, alternate. Shrubs or 
trees. Stamens as many, or twice as 
