ERICACES. 117 
SILVA OF NORTH AMERICA. 
Vaccinium macrocarpon, which contains a bitter principle for which the name of oxycoccin has been 
proposed. Most of the Vacciniums produce handsome flowers and fruit, and the leaves of several 
of the North American species assume brilliant colors in the autumn. Several are desirable garden 
plants, especially the High-bush Blueberry, Vaccinium corymbosum,? and the Deerberry, Vaccinium 
stamineum,*® of eastern America, and the evergreen Vacciniwm ovatum* of the Pacific regions of North 
America. 
In North America Vaccinium escapes the attacks of disfiguring insects and serious fungal diseases.” 
Vaccinium, the classical name of Vaccinium Myrtillus, was adopted by Linnzus as the name of 
this genus. 
1 Am. Jour. Pharm. 1863, 321. 
2 Linneus, Spec. 350 (1753). — Wangenheim, Nordam. Holz. 109, 
t. 30, £. 68. — Watson, Dendr. Brit. ii. 123, t. 123. — Bot. Mag. lxii. 
t. 3433. — De Candolle, Prodr. vii. 571.— Emerson, Trees Mass. 
ed. 2, ii. 454, t. — Gray, Syn. Fl. N. Am. ii. 22. — Watson & Coul- 
ter, Gray’s Man. ed. 6, 313. 
Vaccinium disomorphum, Michaux, Fl. Bor.-Am. i. 231 (1803). 
8 Linneus, 1. c. (1753). — Willdenow, Spec. ii. 349. — Andrews, 
Bot. Rep. iv. t. 263.— De Candolle, 1. c. 567.— Gray, J. c. 21. — 
Watson & Coulter, J. c. 312. 
Vaccinium album, Pursh, Fl. Am. Sept. i. 285 (not Linnzus) 
(1814). 
Vaccinium elevatum, De Candolle, J. c. (excl. var.) (1838). 
Picrococcus stamineus, Nuttall, Trans. Am. Phil. Soc. n. ser. 
viii. 262 (1843). 
Picrococcus elevatus, Nuttall, J. c. (1843). 
Picrococcus Floridanus, Nuttall, 1. c. (1848). 
* Pursh, Fl. Am. Sept. i. 290 (1814). — Bot. Reg. xvi. t. 1354. — 
Hooker, Fl. Bor-Am. ii. 34.—De Candolle, J. c. 570.— Gray, 
Brewer & Watson Bot. Cal. i. 451; Syn. Fl. N. Am. ii. 25. 
Vaccinium lanceolatum, De Candolle, J. c. (1838). 
Metagonia ovata, Nuttall, J. c. 264 (1843). 
5 A number of curious fungi are parasitic on North American 
Vacciniee, some being peculiar to this country, and others, occur- 
ring also in Europe, being more abundant and more highly devel- 
oped here. The most striking are the species of Exobasidium, the 
European Exobasidium Vaccinii, Woronin, being exceedingly common 
on several species of Gaylussacia and Vaccinium. This attacks the 
leaves, causing them to swell up and assume at first a pink color 
When this fungus 
attacks the flower it causes conspicuous although usually symmetri- 
cal distortions often believed to be the work of insects. 
Several interesting Rusts are found on American Vacciniezx. 
which later is powdered with the white spores. 
Melampsora Vacciniorum, Schroeter, affects the leaves of several 
species, and Melampsora Geppertiana, Winter, causes the curious 
distortions popularly known as “ witches’ brooms,” which are often 
of large size on the leaves of Vaccinium corymbosum. A number 
of small characteristic Discomycetes affect the leaves of Vacciniee 
in this country, which are also injured by the mildews, Microsphera 
Vaccinti, Cooke & Peck, and by Rhytisma Vaccinii, Fries. 
