486 
ULVA— UVULARIA. 
f. Flowers appear before the leaves, a mag- 
nificent tree. 
fid"va, (slippery-elm, M. Ap. Ip.) branch- 
es scabroaa, white ; leaves ovate-oblong ; 
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. Tlie mu- 
cilage of the inner bark medicinal. 
nemoraV'is, (river-elm, Ap. .) leaves ob- 
long, somewhat glabrous, equally serrate, 
nearly equal at base ; flowers sessile. 
racemo'sn, ( I7 .) flowers in racemes ; pedi- 
cels in di.slinct fascicles united at their ba- 
ses ; leaves ovate, acuminate, auriculate on 
one side, doubly serrate, glabrous above, 
minutely pubescent beneath ; stamens 7-10 ; 
stigmas 2, recurved. 
ala'ta, (whahoo. Mar. branches on 
each side winged with a cork-like bark , 
leaves nearly sessile, oblong-oval, acute, 
doubly serrate, nearly equal at base ; fruit 
pubescent, ciliate. 30 f. 
UL"VA. 21—4. {AlgcE.) 
lin"za, frond lance-linear; margin undu- 
late-crisped ; about an inch broad, tapering 
at the base, green. Seashore. 
URASPER"MUM. 5—2. {Umbelliferm.) [From 
outa, a tail, and spernia, seed.] 
clayto'ni, (sweet cicely, J. 2/.) leaves 
compound, hairy; leafets gash-toothed ; um- 
bels axillary and terminal, about 5-rayed ; 
style as long as tlie villose germ, filiform, 
reflexed. 2 f. 
URE'DO. 21—6. (Fungi.) [From uro, to burn, 
on account of its burnt color.] 
linea'ris, (yellow grain-ruf5t, J. linear, 
very long, stained yellow, at length but ob- 
scurely colored On the culms and leaves 
of barley, oats, rye, wheat, &c. 
UR"TICA. 19—4 (UrticecE.) [From wrentfo, 
burning ; on account of the sensation it 
cau.ses.] 
dio'ica, (common nettle, J. li) leaves 
opposite, cordate, lance-ovate, coarsely sei"- 
rdtc ; flowers dia^cious ; spikes panicled, 
glomerate in pair.s, longer than the petioles. 
"1-6 f. 
pii'mila, (rich-weed, Ju. @.) leaves op- 
posite, ovate, acuminate, .3-nerved, serrate ; 
lower petioles as long as the leaves ; flow- 
ers monoecious, triandrous, in clustered 
corymbs, shorter than the petioles; stem 
succulent, almost transparent. 6-12 i. Wet 
grounds. 
n'reus, (stinging nettle, J. stem his- 
pid ; leaves opposite, elliptic, about 5-nerv- 
ed, acutely serrate ; spikes glomerate, in 
pairs. 12-14 i. 
ca-iaden"siu, (Canada nettle, Ju. I^.) 
leaves cordate-ovate, acuminate, hispid on 
both sides ; panicles axillary, mostly in 
pair.s, divaricately branched ; the lower 
Btaminate (mes longer than the petioles; 
uppei pi.stillate ones elongated; stem his- 
pid, stinging. 5-6 f. Ya.T. divaricfi'La \eQ.ves 
smooth; panicles solitary, spreading. 4 6 f. 
chamcjedroi'dcs, (Mar. stem gliibrous ; 
•eaves opposite, sub-sessile, ovate, serrate, 
sli'igose beneath : clusters of flowers axil- i 
lary, sessile, sub-globose, reflexed, prifklea 
stimulant, white. 4-6 i. S. 
rctic.nla'ta, (r-y.) leaves deep green. A 
native of Jamaica. 
US'^NEA. 21—5. (Filices.) 
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 common on dry, dead limbs of ever- 
greens, from which it often hangs in long, 
green locks. 
UTRICULA'RIA. 2—1. {Scrophularia;.) [From 
utriculus, a little bladder.] 
vulga'riit, (bladder- wort, y. Au. 2J[.) float- 
ing ; stem submerged, dichotomous ; leaves 
many-parted, margins bristly; scape 5-9- 
flowered ; upper lip of the corolla entire, 
oroad, ovate ; spar conical, incurved ; flow- 
ers in racemes. Ponds. 
stria' ta, floating; scape 2-6-flowered, 
rootfurni.shed with air-vessels ; corolla large, 
yellow striate with red ; 8p"ur much shorter 
than the lower lip. 
pitrpii'rea, scapes axillary, generally 2ai' 
3 inches long ; flowers purple. Ponds on 
mountains. Mass. to Flor. 
injia'ta, (y. Au. 2X.) radical leaves ver- 
ticillate, inflated, pinnatifid at their ex- 
tremities ; lower lip of the corolla 3-lobed 
spur deeply emarginate. Ponds. 
stria'ta, (y. J. 11.) floating; scape 2-6- 
flowercd ; upper lip of the corolla ovate- 
round, sub-emarginate, margin waved , 
lower lip 3-lobed, sides reflected ; .spur 
straight, obtuse, shorter than the lower lip. 
Swamps. 
^ih'''ba, (y. Ju. 11) floating; scape mostly 
2-flowered ; spur shorter than the lower 
lip of the corolla, obtuse, gibbous in the 
middle. 1-3 i. Ponds. 
cornu'ta, (y. Au. 2_f.) scape rooting, erect, 
rigid; flowers 2-3, sub-se.ssile ; inferior lip 
of the corolla very wide 3-lobed; spur very 
acute, lengthened out longer than the co 
rolla. 10-12 i. Wet rocks. 
persona'ta, (y. ^.) scape rooting, many 
flowered ; upper lip of the corolla emargin- 
ate, reclined ; lower one small, entire, pal- 
ate large; spur linear-subulate, acutish. 
Bogs. 
seta'cea, (y. J. IX) scape rooting, filiform, 
upper lip of the corolla ovate, lower one 
deeply 3-lobed ; spur subulate, entire. 3-6 
i. Swamps. 
inte'gra, (y. %) floating; scape 1-2-flow- 
ered ; upper lip of the corolla sub-3-lobed , 
lateral lobes sub-involute ; lower lip entire ; 
spur nearly equalling the lower lip. S. 
bijlo'ra, (y. Ju.) spur subulate, obtuse, 
about as long as the lower lip; scape about 
2-flowered ; leaves setaceous. S. 
UVULA'RIA. G— 1. (JAliacem.) [From uwwfti, 
a membrane of the throat, the soreness of 
vvliich tiiis is supposed to heal.] 
pcrfolia'ta, (bell- wort, y. M. 2^.) leaves 
perfoliate, oval-obtuse (lance-linear or oval- 
oblong in the young state) ; corolla bel" 
liliaceous, scabrous or granular within ; an 
I ther cu.spidate. 8-12 i. 
