ULMUS-VACCINIUM. 
147 
CLMUS. 5-2. (AmentacecB.'} 
america'na, (elm, white-elm, g-p. Ap. Tj.) branches smooth; leaves oblique at 
rhe base, having acuminate serratures a little hooking ; flowers pedicelled ; 
fruit fringed with dense down. Var. pendula, has hanging branches and 
smoothish leaves. 40-70 f. Flowers appear before the leaves, a magnificent 
tree. 
fuV'va, (slippery-elm, M, Ap. T^ ) 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 7. The mucilage of the inner bark medicinal. 
ULVA. 21-4. Ulgce-) 
lin'za, frond lance-linear ; margin undulate-crisped ; about an inch broad, ta- 
pering at the base, green. Sea-shore. 
URASPERMUM. 5—2. iUmbellifercR.') [From owrcr, a tail, and sperma, seed.] 
dayto'ni, (sweet cicely, J. %.) leaves compound, hairy ; leafets gash-toothed ; 
umbels axillary and terminal, about 5-rayed ; style as long as the villose 
germ, filiform, reflexed. 2 f 
UREDO. 21 — 6. {Fungi.) [From tiro, to burn, on account of its burnt colour.] 
linca'ris, (yellow grain-rust, J. <v).) linear, very long, stained yellow, at length 
but obscurely coloured. On the culms and leaves of barley, oats, rye, 
wheat, &c. 
URTICA. 19 — 4. {Urticecb.) [From wrenc^o, burning; on account of the sensation it causes.] 
dice'cia, (common nettle, J. %.) leaves opposite, cordate, lance-ovate, coarsely 
serrate ; flowers dioecious ; spikes panicled, glomerate in pairs, longer than 
the petioles. 2-3 f. 
U§NEA. 21—5, (Filices.) 
plica'fa, 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. 
UTRICULA.RIA. 2—1. (ScrophularicB.) [From utriculus, a little bUdder.] 
vulga'ris, (bladder-wort, y. Au. 1]-.) floating ; stem submerged, dichotomous ; 
leaves many-parted, margins bristly ; scape 5-9-flowered; upper lip of the 
corolla entire, broad, ovate ; spur conical, incurved ; flowers in racemes. 
Ponds, 
sirm'to, 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. (Liliacem.) [From uvula, a membrane of the throat, the soreness of 
which this was suppose'd to heal.] 
perfolia'ta, (bell-wort, y. M. %.) 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, %.) stem smooth ; leaves sessile, oval-lanceolate, glaucous 
beneath; petals flat, smooth within; capsules stiped. 6-12 i, 
grandiflo'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. (EricecB.) [A corruption of baccinium, a berry.] 
resino^sum, (whortleberry, a. p. M. I7.) leaves slender, petioled, oblong-oval, 
mostly obtuse, entire, bedewed with resinous specks beneath ; racemes lat- 
eral, 1-sided ; pedicels shor', 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. 
corymbo'sum, (high whortleberry, w. M. Pj.) 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. 
