Series VIII. Precoccs. Munson 



22. VITIS VULPINA, Linnaeus.* Soecies 203 in part, fide Planchon, L. C. 109. (See 

 Plate XXXII.) 



Synonyms : 



V. riparia, Michaux. Fl. 2, p. 231. 



V. palmata, Vahl. Symb. Bot. Ill, p. 42, Harvard Herbarium. 



V. incisa, Jacq. Hort. Schoenb. 4, 14, 7, p. 427. 



V. odoratissima, Bonn. Cata. Cant., p. 66. 



V. cordifo'ia, Darling, Fl. Cestr., p. 151. 



V. cordifolia, var. riparia, Gray, Man., p. 113. 



V. vulpina, var. riparia, Regel. Conspect.Vitis, p. 395. 



"Riverside Grape," "August Grape," in Illinois, "Frost Grape," in Michigan, Wisconsin 

 and Minnesota. 



Plant: Little tapering, moderately branching, climbing moderately, 15 to 30 feet or more. 

 The rapidly expanding leaves, after first opening, make the growing branches appear quite 

 leafy towards the tips in comparison with V. cordifolia, yet less so than V. Longii and still less 

 than V. rupestris. 



Roots: Penetration fair, about with V. labrusca, not nearly so good as V. cordifolia or 

 V. Longii; color whitish; mucilaginous and astringent, not pungent fibrous, slender, hard, little 

 or not at all transversely wrinkled. 



Wood: Young terminal wood smooth or pubescent, cylindrical, reddish, becoming clear 

 green, bark of annual wood when mature finely striated, of a dark, in eastern, or light crimson 

 in western specimens, cracking and easily separating into thin, weakly, fibrous plates at close 

 of first year and during the second year. Wood rather soft, probably the softest in the shears 

 of any of our species; section of annual wood shows thin rays with pores quite open between, 

 nodes slightly swollen and little bent, with very thin diaphragm 1/20' to 1/30' thick. Buds small 

 to medium, globose on young conical or slightly three angled on fully mature annual wood, 

 covered with brown scales except tip, when mature, which is whitish woolly; large globose, rusty 

 green in first opening; tendrils cling well but less strongly by far than V. cordifolia; internodes 

 short to medium, 1 ' to 4', cylindrical; pith medium, meeting the diaphragm abruptly, light brown. 



Leaves: Stipules large, 3/16' to 5/16' long, 1/2 to 2/3 as wide, membranaceous, becoming 

 light brown and shedding when its leaf is about full size; petiole in length about the width of 

 the blade, cylindrical or slightly elevated on upper side, with a slight groove in elevation, the 

 sides of groove pubescent even in otherwise smooth specimens, in some specimens pubescent 

 all over; color when young usually pale red or green, sometimes dark red, becoming mostly 

 green with age, set at an obtuse or right angle to the blade, which is 3' to 5' rarely 6' to 7' 

 broad, and about same length from basal sinus to tip, about one- third folded toward upper sur- 

 face; basal sinus broadly n shaped, mostly obtuse at insertion of petiole but sometimes acute, as 

 in V. cordifolia as is the case with the specimen from Utah ; basal lobes rarely if ever lapping ; lateral 

 lobes rarely separated by narrow rounded sinuses then giving the leaf a palmate form, as in 

 that classified by Vahl. as V. palmata; outline strongly shouldered with cut-lobes, having taper 

 points, not quite so long or sharp as the terminal point; teeth large, irregular, acute, rarely right 

 angled, with margin mostly straight, scarcely mucronulate but sometimes with margins convex, 

 and then mucronate as in V . cordifolia (such forms come from regions where V. cordifolia grows 



* COLUMBIA COLLEGE HERBARIUM, NEW YORK, Sept. 29, 1891. 



MY DEAR MR. MUNSON: I am just back from Europe and find your letter of Sept. 4, and the box of grape 

 fruits, for both of which I thank you sincerely. Yes, I looked at the original specimens of Vitis vulpina, Linn., 

 and I think with Planchon that it is V. riparia, Michaux. It certainly has nothing to do with V, rotundi folia, 

 Michaux. Yours sincerely, 



N. L. BRITTON. 



94 



