152 ZANNICHELLIA-ZOSTERA. 



glorio'sa, (vv. Au. Ij-.) caulescent, branching; leaves broad-lanceolate, plaited!, 



entire ; petals lanceolate. 2-4 f. 

 alnifo'lia, leaves lance-linear, with callous crenatures, rigid. 10-12 f. 

 ZANNICIIELLIA. 19—1. (Naidcs.) ^ 



palustr i s, snihers 4-celled ; stigmas entire; pericarps toothed on the back; 

 stem long, iiliform ; flowers small, axillary. Horn pond- weed. Dit3he.s. 

 ZANTIIORHIZA. 5—13. (Raminculacea.) [From xanthos, yellow, riza, root] 

 apiifo'lia, (parsley yellow-root, p. Ap. ?2 ) stem simple; leaves 3-ternate ; pe- 

 tioles dilated and clasping at the base ; racemes compound, below the leaves. 



ZANTHOXYLUM. 21—5. (Terebintacea.) [From xanthos, yeUow, zulon, wood.] 

 fraxin"eum, (prickly-ash, toothache-bush, g. w. M. I7.) prickly; leaves pin- 

 nate ; leafets lance-oval, sub-entire, sessile, equal at the base ; umbels axil- 

 lary. 8-12 f. 



ZAPANIA. 13—2. (ScrophularicB.) 

 nodijlo'ra, b-w. Ju. %.) leaves ovate wedge-form, serrate above ; spikes soli- 

 tary, in long filiform peduncles, forming conical heads; stem herbaceous, 

 creeping, 6-8 inches long, procumbent. 

 lanceola'ta, 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.) 

 glabcrri'mus, (w. J. %..) scape leafy ; bracts ovate, acuminate ; petals acumi- 

 nate; leaves long, recurved, channelled. 2-4 f. 

 ZINNIA. 17—2. (Corymbifera..) 

 viola'cea, (r-p. Ju.) leaves ovate-acute, sessile, sub-crenate ; chaff imbricate- 

 serrate. 

 ZIZANIA. 19—6. {GTaminecb.) 

 aquaV'ica, (wild rice, Au. %?j panicle pyramidal, divaricate and sleril at the 

 base, spiked and fertile above ; pedicels clavate; awns long; seed linear. In 

 water. 

 ZIZIPHUS. 5—1. (Rhamni.) 

 volu'biles, (g-y. Ju. %.) unarmed; leaves ovate, ribbed, entire; umbels axil- 

 lary, peduncled ; stem twining. iS. 

 ZORNIA. 16—10. (Leguminosm.) 

 tetraphylla, (y. Ju. %..) leaves digitate ; leafets 4, lanceolate, glabrous ; spikes 

 axillary; peduncled ; flowers alternate, 2-bracted ; bracts roundish. S. 

 ZOSTERA. 19—1. (Naides.) [From zos/er, a girdle.] 

 mari'na, (sea-eel grass, Au. %.) leaves entire; stem terete; flowers rexy 

 small ; leaves long. In salt water. 



