Hesperis pinnatifida MICHNX.. 
Heterachaena ZoLL........... 
Heterachthia Kunzg......... 
Heteranthelium Hocust..... 
Heteranthera R. and P......... 
— dubia (JAcQ.). .... 
Heteranthera graminea VAHL 
Heterocaryum A. DC 
Heterochaeta DC........... Did OF 
Heterogaura ROTH....... .... 
Heterolaena Scu.-BIpP......... 
Heteromeris SPACH........... 
Heteropleura ScH.-BIP........ 
Heteropogon PERS............ 
Heteroseris Boiss.......2....65 
Heterosteca DESVX........... 
Heterotropa Morr and DECNE 
Heteryta RAF............4.005 
Heuchera LIxx cerns 
—foliosa RAF............. 
Heuchera hispida PURSH...... 
Heuchera lucida SCHLECHT... 
—reniformis RAF......... 
—richardsonii R. Br...... 
—scapigera MOENCH...... 
viscida PURSH.......... 
Heuffelia SCHUR.............. 
Hexameria T. andG.......... 
Hexonychia SALIsB........ .. 
Heyfeldera Scu.-Br...... rr 
Hibiscus Linn sa joew haven a bael ete 
—laevis SCOP........... : 
Hibiscus militaris CAV ......... 
Hibiscus riparius PERs........ 
virginicus WALT........ 
Hicoria, RAr ss snes. os 
Amara RAR. 2os cack ose 
—minima BRITT.......... 
=O ata. BRITT csanasiin Sans 
HMieracium LINN.. tetera 
Hieracium auratum FR....... 
—barbatum NUTT........ 
Hieracium canadense MICHX... 
Hieracium corymbosum FR... 
fasciculatum PURSH.... 
——gronovii LINN.......... 
——helianthiifolium FROEL 
——kalmii SPRENG......... 
Hieracium longipilum ToRR.. 
Hieracium macrophy yllum 
—prenanthoides HOOK. .. 
——Tuncinatum JAMES...... 
—scabriusculum SCHWEIN 
—subnudum FROEL....... 
Hieracium venosum LINN...... 
INDEX. 
256 Hieracium virgatum Purs#.. 
394 Hierochloe GMEL............... 
136 Hierochloa borealis AUCT..... 
85 —fragrans R. and S....... 
135 ——odorata AUCT........... 
138 Hierochloe odorata var fragrans 
138 CWIBED:) ocic.cc55 beets 
440 Himantoglossum SPRENG..... 
525 Hippion SCHM..... ..........- 
47 Hippomanoe AGuH.. ere 
494 Hippophae argentea PURSH. 
O43) ep puris) INN <4 snes connetnutes 
263 Hippuris polyphylla Rar...... 
376 ©Hippuris vulgaris LINN........ 
901. Hirculus-HAWiss<csssaewssses 
364, Hisutsua DC; . 2.5.23 eveccters 
568 Hocquartia DUM.............. 
47 Holargidum TURcz........... 
5G. dH olCus Ri. BRi.s cos eateaeiene 
70 ——fragrans WILLD......... 
381 Hololepis DG... 2s. cscen cece 
201 MHoloschoenus LINK........... 
435  Holosetum STEUD............ 
275 Holostigma G. Don........... 
276 «=Holostigma SpacH....... ... 
276 Holostylis DUCHARTRE....... 
276 HomalocarpuS SCHUR......... 
275  Homalocenchrus MIEG......... 
275 ——oryzoides (LINN.)......-. 
276 ——virginicus (WILLD.)...... 
275 Homoeatherum NEEs......... 
2G = FLomOlobus NUTT. asc ccc nine 
276 Homopappus NUTT........... 
68 Homostylium NEES........... 
493  Hoorebekia CORNEL.......... 
147 Hoplotheca SPRENG.......... 
507 Hoppea REICH................ 
361 Hordeurne LINN 2.222 pecainetase 
361 ——jubatum LINN..........- 
361 Hordeum murinum var. B. 
361 TIN Nica, eagct hd beregsara 
361 Hordeum nodosum LINN. .....- 
361 Hordeum pratense HuDs...... 
177 —npratense var. nodosum 
78 LEDyss 255 34545055556 
VWs pusillum NCTE e2 ecco 
178 secalinum SCHREB...... 
568 Horkelia CHAM.and SCHLECAT 
569 Horkelia REICH............... 
568 Hosackia DOUGL............. 
569 ——pilosa NUTT... ... ...... 
569 ——purshiana BENTH....... 
569 ——unifoliolata Hook ...... 
569 Hostia MOENCH............. 
569 Houstonia LINN... .......... 
569 Houstonia angustifolia PURSH 
568 ——ciliolata TorRR.......... 
—longifoliaGAERTN...... 
569 Houstonia purpurea var. ciliolata 
569 (BOREL) sein sede ese 
568 —purpurea var. longifolia 
569 (GAERTN.)........0005 
569 Howardia KLorzscH..... ... 
569 Hubertia Bone............... 
