CAPRIFOLIACEAE. 173 



VIBURNUM. Arrow Wood. 

 Usually deciduous shrubs or small trees with pale or brown 

 wood with minute ducts and very fine medullary rays ; slender 

 or moderately stout terete or 6-sided twigs with continuous pith 

 of corresponding shape; opposite somewhat raised crescent-shaped 

 leaf-scars with 3 bundle-traces ; no stipule-scars ; oblong more or 

 less stalked appressed buds with 2 valvate or connate exposed 

 scales (naked in one group) ; lanceolate to ovate entire or toothed 

 or lobed petioled leaves ; small perfect wheel-shaped gamopetalous 

 5-merous white flowers (sometimes larger and neutral in the 

 margin or throughout,) in terminal corymbs; and rather small 

 often flattened inferior drupes. 



1. Buds naked : young growth very stellate-scurfy. 2. 

 Buds scaly. 4. 



2. Flowers salver-shaped, early, fragrant. V. Carlesii. 

 Flowers wheel-shaped, later. 3. 



3. Leaves very large, thin, cross-veined beneath. V. alnifolium. 

 Leaves moderate (scarcely 8X10 cm.), firmer. V. Lantana. 



4. Leaves pinnately veined, not lobed. 5. 

 Leaves palmately veined and often lobed. 15. 



5. Very stellate-pubescent : leaves impressed-veiny. 6. 

 Neither very pubescent nor impressed-veiny. 8. 



6. Some of the flowers fertile. 7. 



All of the flowers showy and sterile. V. tomentosum plenum. 



7. Leaves elliptical-ovate. V. tomentosum. 

 Leaves lanceolate. V. tomentosum lanceolatum. 



8. Veins distinct to the coarsely toothed margin. 9. 

 Veins looping or vanishing short of the margin, n. 



9. Leaves glabrate : petiole rather long : no stipules. V. dentatum. 

 Leaves rather persistently pubescent beneath, with stipules. 10. 



10. Stipules much shorter than the petiole. V. molle. 

 Stipules longer than the very short petiole. V. pubescens. 



11. Leaves entire, revolute, dotted beneath. V. nudum. 

 Leaves more or less finely toothed. 12. 



12. Leaves dotted beneath. V. cassinoides. 

 Leaves not dotted. 13. 



