CAPRIFOIvIACEAE ^ 293 



Flower-clusters long-peduncled : flowers in pairs. 



4. LiXNAEA. 



Flower-clusters sessile or nearly so : flowers not in pairs. 



5. Symphoricarpos. 

 Corolla irregular, the limb more or less 2-lipped. 6. L,onicera. 



Fruit capsular. 7. Diervilla. 



1. SAMBUCUS L. 



Fruit purple or black : cymes flat-topped, broad. i. 5". Canadensis. 



Fruit red : cymes ovoid, fully as long as broad. 2. 5. pubens. 



1. Sambucus Canadensis L. American or Sweet F,lder. (Man. 

 p. 869 ; I. F./. 3432.) In moist soil, N. B. and N. S. to F'la., Man., Kans. 

 and Tex. — Pennsylvania: Monroe; Northampton; Bucks; Dela- 

 ware ; Chester ; Lancaster ; Luzerne ; Franklin ; Huntingdon ; 

 Allegheny. 



2. Sambucus pubens Michx. Red-berried Elder. (Man. p. 869 ; 

 I. ^. f. 3433-) In rocky places, N. B. to Alaska, B. C, Ga., Colo, ani 

 Calif. — Pennsylvania : Monroe ; Northampton ; Bucks ; Lancaster ; 

 Luzerne ; Berks ; Huntingdon ; Tioga ; Schuylkill ; York ; 

 Allegheny. 



2a. S. pubens dissecta Britton. (Man. p. 870.) — Blair. 



2. VIBURNUM L. 



Marginal flower of the cymes radiant, conspicuous : fruit red. 



Leaf -blades doubly serrate, pinnately veined : fruit mostly over 10 mm. long. 



1. V. alnifoliuni. 

 Leaf-blades lobed, palraately veined : fruit mostly less than 10 mm. long. 



2. v. Opuliis. 

 Marginal flowers of the cymes not radiant, no more conspicuous than the rest : 



fruit blue or black, except in T'. paticiflorum. 

 Leaf-blades palmately veined or 3-ribbed. 



Cymes with abbreviated rays : fruit red. 3. V. pauciflorum. 



Cymes with elongated rays : fruit nearly black. 4. V. acerifoliiim. 



Leaf-blades pinnately veined. 

 Cymes decidedly peduncled. 

 Leaf-blades coarsely dentate. 



Leaves with sessile or very short-petioled blades. 5. V. piibescens. 

 Leaves with relatively long-petioled blades. 

 Lower surfaces of the leaf-blades glabrous or merely tufted in the 



axils. 6. V. dentatum. 



Lower surfaces of the leaf-blades stellate-pubescent. 



7. V. molle. 

 Leaf-blades entire or irregularly erose-crenulate. 

 Peduncles shorter than the cymes. 8. V. cassinoides. 



Peduncles as long as the cymes or longer. 9. V. nudum. 



Cymes sessile or nearly so. 



Leaf-blades prominently acuminate, 10. V. Lentago. 



Leaf-blades obtuse or merely acute. 11. V. prunifoliuni. 



1. Viburnum alnifolium Marsh. Hobble-bush. (Man. p. 870; I. F. 



/. 3434.) In low woods, N. B. to N. C, western N. Y. and Mich. 



— Pennsylvania : Monroe ; Centre ; Tioga ; Blair ; Venango ; Erie. 



