152 ZANNICHELLIA-ZOSTERA. 
glorio'sa, (w. Au. caulescent, branching ; leaves broad-lanceolate, plaited^. 
entire ; petals lanceolate. 2-4 f. 
ahiifo'lia, leaves lance-linear, with callous crenatures, rigid. 10-13 f. 
ZANNICHELLIA. 19—1. (Naides.) 
palustris, anthers 4-celled ; stigmas entire; pericarps toothed on the backg 
stem long, filiform ; flowers small, axillary. Horn pond-weed. Ditches. 
ZANTHORHIZA. 5 — 13. (RanunculacecB.') [From xanthos, yellow, riza^ root.] 
apiifo'lia^ (parsley yellow-root, p. Ap. T2 ) stem simple; leaves 3-ternate ; pe- 
tioles dilated and clasping at the base ; racemes compound, below the leavea, 
ZANTHOXYLUM. 21—5. iTerebintacem.) [From xanthos, yellow, zulon, wood.] 
fraxin^eum^ (prickly-ash, toothache-bush, g. w. M. T^.) prickly; leaves pm- 
nate ; leafets lance-oval, sub-entire, sessile, equal at the base"; umbels axil- 
lary. 8-12 f. 
ZAPANIA. 13—2. iScrophularicB.) 
nodijlo'ra, b-w. Ju. 1}..) leaves ovate wedge-form, serrate above ; spikes soli-» 
tary, in long filiform peduncles, forming conical heads ; stem herbaceouSj 
creeping, 6-8 inches long, procumbent. 
lanceoWta^ leaves linear-lanceolate, spikes solitary. Banks of streams. 
ZEA. 19—3. (GraminecB.) [An ancient Greek name.] - 
mays, (Indian-corn, y-g. Ju. leaves lance-linear, entire, keeled. S. 
ZIGADENUS. 6-3. (Junci.-) 
glaberri'mus, (w. J. scape leafy ; bracts ovate, acuminate ; petals acumi- 
nate ; leaves long, recurved, channelled. 2-4 f. 
ZINNIA. 17—2. iCorymbifercb.) 
vioWcea, (r-p. Ju.) leaves ovate-acute, sessile, sob-crenate ; chaff imbricate- 
serrate. 
ZIZANIA. 19—6. (GraminecB.^ 
aquaP'ica, (wild rice, Au. %.') panicle pyramidal, divaricate and steril at the 
base, spiked and fertile above ; pedicels clavate ; awns long ; seed linear. In 
water. 
ZIZIPHUS. &-1. (Rkamni.) 
volu'hiles, (g-y, Ju. I^.) unarmed ; leaves ovate, ribbed, entire ; umbels axil- 
lary, peduncled ; stem twining. S. 
ZORNIA. 16—10. iLeguminos(B.) 
tetraphylla, (y. Ju. %.) leaves digitate ; leafets 4, lanceolate, glabrous; spikes 
axillary, peduncled ; flowers alternate, 2-bracted ; bracts roundish. S. 
ZOSTERA. 19—1. (Naides.) [From ^osfer, a girdle.] 
mari'Tui, (sea-eel grass, Au. %.) leaves entire; stem terete; flowers rery 
small ; leaves long. In salt water. 
