588 
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Woolly spiked grama..............cee00- 532 | Yellow jessamine ......06 silig 0 +4 seas enue 271 
stemmed grama...............24. 532 nelumbo .........0 cece rec ccceece 11 
Worm-grass ..--2- 00.0.0. 000. cc eee ween ee 271 pine .... 2.2.2... eee . 554 
Worm seed ...... 2.0.00. 2.022 e eee een ee 368 pond -lily .. 2.2.2.2 .2. cece eee ee 12 
Wormwood ....... 222.022.2020 2 ccc c een eee 239 | Yellow-eyed grass .............22.2.2---- 442 
Woundwort .......... cect e eee e eee eeeeeee 343 | Yellow-eyed grass family .........2..2. a 441 
Yerba de Vemulo .......2.......0.aeeeee. 121 
Xanthisma...........0... 22.20 cee ee eee ee 185 Yucea 2.2... eee ce een ee eens 436 
Xanthium ...... 2.2.2... eee eee 210 
Xanthoxylum..............2.2.02..20.008 53 | Zacaton..... 22.20.22 eee ee eee en ee weeeee 520 
Nimenesia ........0.22 2020 c ee eee eee eee 221 | Zanichellia .....-.......0000. 0c eee e eee eee 457 
XYRIDACER........ we tence cece cece eeeees 441 | Zexinenia ........... 02.022 eee eee eee 220 
MYVIS 2... eee eee eee eee eee ewes 442 | Zemenia ..... 22.2222. 2 eee eee 217, 220, 221 
VAD AD cs 211 
Yam . Thott testes eects ence ee ec tate ne eeees 430 | Zizania ......-.000-ccee- cee. 2 eee eee. 511 
Yam family -...-----2-+-20--2-2+2seeee ees 430 Zizaniopsis ......... 200.22 c eee eee een e ee 511 
Varrow ....---2--seeeeeseceee sees eseeenee P89 | Figia. oo... .. seen cece ccaceecsececeeee 147 
Yaupon.............0....2. 00222005 ecccce 56 VATA ht 59 
Yellow-barked oak.................2--2-- 416 | Zornia .......--------... vecucecececccecee 85 
chestnut oak...........22.......- 415 | Zygadenus.. 22.2... eee ces cece ee eece cence 440 
fT... esses ee ee tteeeeeeeee ees 555 | ZYGOPHYLLER ....2..c2ec0seeceeeseseeee 49 
