ULMU S—VACCINIUM. 
147 
TJLMUS. 5—2- ( Amentacea .) 
america'na , (elm, white-elm, g-p. Ap. T 7 .) branches smooth; leaves oblique at 
the base, having acuminate serratures a little hooking ; flowers pedicelled ; 
fruit fringed with dense down. Yar. pendula, has hanging branches and 
smoothish leaves. 40-70 f. Flowers appear before the leaves, a magnificent 
tree. 
fuV'va , (slippery-elm, M. Ap. f>.) branches scabrous, white; leaves ovate-ob¬ 
long ; very acuminate, pubescent on both sides ; buds tomentose, with a 
thick tawny wool; flowers sessile, smaller than the white-elm. Leaves 
larger ; stamens often?. The mucilage of the inner bark medicinal. 
ULVA. 21-4. (Alga.} 
lin'za , frond lance-linear ; margin undulate-crisped; about an inch broad, ta¬ 
pering at the base, green. Sea-shore. 
URASPERMUM. 5—2. ( Umbelliferca .) [From oura, a tail, and sperma, seed.] 
clayto'ni, (sweet cicely, J. 7j-.) leaves compound, hairy ; leafets gash-toothed ; 
umbels axillary and terminal, about 5-rayed; style as long as the villose 
germ, filiform, refiexed. 2 f. 
XJREBO. 21— 6 . (Fungi.) [From uro , to burn, on account of its burnt colour.] 
linca'ris , (yellow grain-rust, J. Cv>.) linear, very long, stained yellow, at length 
but obscurely coloured. On the culms and leaves of barley, oats, rye,- 
wheat, &c. 
BRTICA. 19—4. ( Urticecb .) [From urendo, burning; on account of the sensation it causes.] 
dim'da , (common nettle, J. Tj..) leaves opposite, cordate, lance-ovate, coarsely 
serrate ; flowers dioecious ; spikes panicled, glomerate in pairs, longer than 
the petioles. 2-3 f. 
USNEA. 21—5. ( Filices .) 
j 'plica'ta , frond pendulous, smooth, pale ; branches lax, very branching, sub- 
fibrous ; the extreme ones capillary; receptacles flat, broad, ciliate; the 
hairs very slender and long. On trunks and branches of trees; most com¬ 
mon on dry, dead limbs of evergreens, from which it often hangs in long, 
green locks. 
UTRICULARIA. 2—1. (Scrophularice,.) [From utriculus, a little bladder.] 
vulga'ris , (bladder-wort, y. Au. ?[_.) floating ; stem submerged, dichotomous; 
leaves many-parted, margins bristly; scape 5-9-flowered; upper lip of the 
corolla entire, broad, ovate; spur conical, incurved; flow'ers in racemes. 
Ponds. 
stria'ta, floating; scape 2-6 flowered ; root furnished with air-vessels; corolla 
large, yellow striate with red; spur much shorter than the lower lip. 
purpu'rea , scapes axillary, generally 2 to 3 inches long; flowers purple. Ponds 
on mountains. Mass, to Flor. 
UVULARIA. 6 —1. (Liliacecn.) [From uvula , a membrane of the throat, the soreness of 
which this was supposed to heal.] 
perfolia'ta , (bell-wort, y. M. 7]-.) leaves perfoliate, oval-obtuse, (lance-linear or 
oval-oblong in the young state ;) corolla bell-liliaceous, scabrous or granu¬ 
lar within ; anther cupsidate. 8-12 i. 
sessilifo'lia -, (y. M. 7|_.) stem smooth; leaves sessile, oval-lanceolate, glaucous 
beneath ; petals flat, smooth within ; capsules stiped. 6-12 i. 
grandijio'ra , leaves perfoliate, oblong, acute; perianth smooth within, anthers 
without awns; nectaries nearly round; pistil shorter than the stamens; 
whole plant larger than the preceding species. 
VACCINIUM. 10—1. ( EricecR .) [A corruption of baccinium, a berry.] 
resino'sum , (whortleberry, a. p. M. I 7 .) leaves slender, petioled, oblong-oval, 
mostly obtuse, entire, bedewed with resinous specks beneath ; racemes lat¬ 
eral, 1 -sided ; pedicels short, somewhat bracted; corolla ovate-conic, 5 -cor- 
nered ; berries black. One variety has a yellowish green, and another has 
a reddish yellow corolla. 1-4 f. 
corymb o'sum. (high whortleberry, w. M. 17 .) flower bearing branches almost 
leafless; leaves oblong-oval, acute at each end ; the young leaves pubescent; 
racemes short, sessile, bracted ; corolla cylindrical-ovate. Swamps and wet 
woods, 4 to 8 feet high. Berries large, black, sub-acid. 
