CAPRIFOLIACEAE 293 



Flower-clusters long-peduncled : flowers in pairs. 



4. LiNNAEA. 



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



5. Symphoeicarpos. 

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



Fruit capsular. 7. Diervilla. 



1. SAMBUCUS L. 



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



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



1. Sambucus Canadensis L. American or Sweet Elder. (Man 

 p. 869 ; I. F./. 343^-) In moist soil, N. B. and N. S. to Fla., Man., Kans. 

 and Tex. — Pennsylvania: Monroe; Northampton; Bucks; Dei,a- 

 WARE ; Chester ; Lancaster ; Luzerne ; Frank;i,in ; Huntingdon ; 

 Ai,i,EGHENY. 



2. Sambucus pubens Mich X. Red-berried ELDER- (Man. p. 869; 

 L 'P./.3433-) In rocky places, N. B. to Alaska, B. C, Ga., Colo, and 

 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. alnifolium. 

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



2. V. Opulus. 

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



fruit blue or black, except in V. pauciflorum. 

 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. pubescens. 

 Leaves with relatively long-petioled blades. 

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



axils. 6. V. dentalum. 



Lower surfaces of the leaf-blades stellate-pubescent. 



7. V. molle. 

 Leaf-blades entire or irregularly erose-crenulate. 

 Peduncles shorter than the cymes. 

 Peduncles as long as the cymes or longer. 

 Cymes sessile or nearly so. 

 Leaf -blades prominently acuminate. 

 Leaf -blades obtuse or merely acute. 

 1. Viburnum alnifolium Marsh. Hobble-bush. 

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

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



