884 



Caprifoliaceae 



Triosteum 



o 55 



Map 1941 



Viburnum molle Michx 



50 



Map 1943 

 Viburnum pubescens 

 var mdianense Rehd. 



9. Viburnum pubescens (Ait.) Pursh var. Deamii Rehd. (Jour. 

 Arnold Arboretum 5: 58-59. 1924.) Map 1942. This shrub is found in 

 the southern half of the state in hard, clay soil, associated with sweet gum, 

 black gum, pin oak, and beech. It is also found in the knobstone area to- 

 ward the bases of wooded slopes where it is associated with oaks, or with 

 beech and maple. 



So far as known it is restricted to Ind., Ky. and ne. Mo. 



9a. Viburnum pubescens var. indianense Rehd. (Jour. Arnold Ar- 

 boretum 5: 59. 1924.) Map 1943. Usually found in low woods, asso- 

 ciated with beech, red maple, and sweet gum ; with beech, white ash, shag- 

 bark hickory, and sugar maple; and with white elm, ash, and red oak. 

 Rarely is it found on dry, rocky, wooded slopes and once it was found in 

 a springy terrace along Sugar Creek in Montgomery County. 



Known in Indiana from Montgomery County southward, and in south- 

 western Ohio (Braun). 



8517. TRIOSTEUM L. Horsegentian 



[Wiegand. Triosteum perfoliatum and related species. Rhodora 25: 

 199-203. 1923.] 



Sepals finely and, for the most part, evenly pubescent; stipules of leaves rarely reach- 

 ing the tips of the sepals; flowers 2-6 at each node; corolla pale to deep purple, 

 8-15 (17) mm long, densely puberulent, more or less glandular; stem densely 

 pubescent with short and more or less glandular hairs and with a sparser and 

 longer pubescence or villous with few or no short hairs; leaves narrowly to broadly 

 ovate-oblong, finely strigose to subglabrate above, sometimes with hairs 1 mm 

 long or less. 

 Leaves velvety beneath. 



Principal leaves usually connate-clasping; stem densely short-pubescent with a 

 mixture of longer and shorter hairs, the shorter ones often nearly all glandular; 

 sepals usually narrow (in flower 0.9-2 mm wide), generally very acute; corolla 

 purplish, often greenish on the lower part, firm, the mouth 5-6 mm wide, 

 usually not flaring; fruit usually 6 at some of the nodes, especially the lower 



