164 APOCYNACEAE. 



GELSEMIUM. Carolina Jessamine. 



Evergreen twining woody plants with slender twigs some- 

 what square at the nodes ; roundish continuous white pith ; op- 

 posite elevated crescent-shaped or half-round leaf-scars with a 

 large bundle-trace ; small stipule-scars ; sessile buds with several 

 pairs of pointed scales ; rather small short-petioled entire leaves ; 

 openly funnel-shaped rather large fragrant yellow gamopetalous 

 perfect flowers solitary on short scaly axillary shoots ; moderate 

 thin-walled capsules ; and relatively large winged seeds. 

 Leaves lanceolate, very acute. G. sempervirens. 



BUDDLEIA. 



Deciduous half-shrubs with soft wood with minute diffused 

 ducts and fine medullary rays ; slender squarish twigs ; 4-sided 

 homogeneous pale pith ; opposite low half-round or triangular 

 leaf-scars with I bundle-trace ; narrow stipule-scars ; sessile 

 ovoid acute somewhat spreading superposed buds with usually 2 

 exposed scales ; simple toothed short-stalked moderate leaves ; 

 small mostly lavender perfect funnel-shaped gamopetalous flow- 

 ers in clusters ending the branches ; and small ovoid capsules 

 with minute seeds. 



1. Branches rather erect. 2. 

 Branches spreading or drooping. 3. 



2. Flower clusters straight. B. Lindleyana. 

 Flower clusters drooping. X B. intermedia insignis. 



3. Leaves white- or yellow-tomentose beneath. B. Davidii. 

 Leaves glabrate or finely gray-tomentose. 4. 



4. Flowers lilac, in clusters scarcely 20 cm. long. B. japonica. 

 Flowers violet, in longer clusters (25-30 cm.). X B. intermedia. 



Family APOCYNACEAE. Dogbane Family. 

 A moderate widespread family, members of which yield Af- 

 rican India rubber : one Vinca is largely used in bedding and 

 another for window-boxes. 



VINCA. Periwinkle. 



Evergreen trailing herbs with opposite petioled rather small 

 leaves ; rather large perfect funnel- or salver-shaped stalked 



