151, 354 lloustonia fasclculata, Gray. 
16, 356 polypremoid.es, Gray, n. sp. 
142 Bandia Pringlei, Gray, n. sp. 
314 Ousea subulata, Gray. 
661 Galium llotbroekii, Gray. 
669. Ageratum corytabosum, Zuccagni. 
677J Stevia salicifolia,Cav., var, nana, Gr. 
677 stenopliylla, Gray. 
602, 639, 653 8. serrata, Cav. 
247 Eupatorium Greggii, Gray. 
600 Wrightii, Gray. 
273 solidaginifolium, Gray. 
135 Parryi, Gray. 
266 petioiaris, Mocino. 
613 occideutale, Hook., var, Ariz- 
onicum, Gray. 
608 Carminatia tenuiflora, DO. 
628 Brickellia laciniata, Gray. 
605 Wrightii, Gray. 
350 oliganthes, Gray. 
635 oliganthes, var. crebra, Gray. 
609 Wislizeni, v. paniculata, Gray. 
323 Wislizeni, var. brevifolia,Gray. 
606 floribunda, var. ambiyolepis, 
Gray. 
641 simplex, Gray. 
181 Palmeri, Gray. 
610 veronicsefolia, Gray. 
210 spinulosa, Gray. 
143 glutinosa, Gray, n, sp. 
649 Kuhnia rosmarinifolia, Gray. 
346 Barroeta subuligera, Gray. 
313 Gymnosperma eorymbosum, DC. 
337 Gutierrezia Euthamise, T. & G., var. 
microcepliala, Gray. 
622 sphterocephala, Gray. 
674 Heterotheca Lfimarckii, Cass. 
684 Aplopappus spinulosus, DC. 
338 Solidago Canadensis, L., var. canes- 
cens, Gray. 
175 Aphantostephus liumilis, Gray. 
303 Achwtogeron pinnatifidum, Gray,n.sp. 
14 Psilactis brevilingulata, Schult. Bip. 
288 Aster hesperius, Gray. 
205 Chcetopappa modesta, Gray. 
634 Conyza gnaphalioides, HBK. 
336 Coulteri, Gray. 
335 sophiajfolia, HBK. 
281 Baccharis Bigelovii, Gray. 
619 thesioides, HBK. 
700 angustil'olia, Michx. 
675 glutinosa, Pers. 
18 Gnaphalium Sprengelii, Hook. & Arn. 
362 Wrightii, Gray. 
305 Pringlei, Gray, n. sp. 
678 GuardiolaTulocarpus, v. arguta,Gray. 
631 Parthenium lyratum, Gray. 
297 Melampodium hispidum, HBK. 
10 longicornu, Gray. 
280 Iva dealbata, Gray. 
279 ambrositefolia, Gray. 
278 Hymenoelea monogyra, Gray. 
289 Ambrosia aptera, DC. 
192 Franseria tenuifolia, Gray. 
316 Zinnia pauciflora, L. 
624 Sanvitalia Aberti, Gray. 
650 angustifolia, Engelm. 
42 Yarilla Mexicana, Gray. 
309 Zaluzania cUscoidea, Gray, n. sp. 
148 Gymnolomia tenuifolia, B. & H. 
615 multiflora, Benth & Hook. 
152 Perymenium parvifolium, Gray. 
129 Helianthus laeiniatus, Gray. 
292 Flourensia cernua, DC. 
645 Viguiera linearis, Schult. Bip. 
603 cordifolia, Gray. 
676 decurrens, Gray. 
41 Zexmenia brevifolia, Gray. 
349 podocephala, Gray. 
321 Encelia exaristata, Gray. 
646 lidianlkella Pringlei, Gray, n. sp. 
657 Verbesina Ghihuahuensis, Gray, n. 
620 Heterospermum pinriatum, Cav. 
193 Bidcns pilosa, L. 
683 Galinsoga parviflora, Cav. 
638 Tridax bicolor, Gray. 
71 Riddellia tagetina, Nutt. 
183 Perityle Parryi, Gray. 
308 Bahia bitcrnata, Gray. 
607 Schkuhria Wrightii, Gray. 
343 Florestina tripteris, DC. 
136 Actinella scaposa, Nutt. 
190 Ileleniu'm microcephalum, DC. 
83 Flaveria repanda, Lag. 
6 Chrysactinia Mexicana, Gray. 
307 Dysodia cancellata, Gray. 
643 Hymenatberum polychsetum, Gray 
262 Thurberi, Gray. 
204 pentachaetum, DC. 
627 Tagetes micrantha, Cav. 
207 Porophyllum scoparium, Gray. 
648 Pectis tenella, DC. 
626 Artemisia Mexicana, Willd. 
304 dracunculoides, Pursh. 
625 Ludoviciana, Nutt. 
296 redolens, Gray, n. sp. 
195 Senecio saliguus, DC. 
663 multilobatus, T. & G. 
130 Perezia Wrightii, Gray. 
13 nana, Gray. 
180 Trixis angustifolia, DC. 
614 Lobelia fenestralis, Cav. 
137 Fraxinus cuspidata, Torr. 
694 Macrosiphonia Berlandieri, Gray. 
320 Macrosiphonia braehysiphon, Gray. 
640 Trachelospermitm stuns. Gray, n. sp. 
70, 366 Metastelma barbigerum, Scheele. 
47 Vincetoxicum Mexieanum, Watson. 
692 Gonolobus ChUmahuensis,Gray,n.sp. 
696 stenopetalus, Gray, n. sp. 
199 Buddleia marru.biifolia, Benth. 
19, 20 scordioides, HBK. 
182 verticillata, HBK. 
655 Lceselia cserulea, Don. 
206 Greggii, Watson 
298 glandulosa, Don. 
248 Gilia rigidula, Benth. 
364 Phacelia congesta, Hook. 
162 congesta, Hook., var. dissecta, 
Gray. 
177 integrifolia, Torr. 
167 infundibuliformis, Torr 
267 Nama undulatum, HBK. 
664 Coldenia Greggii, Gray. 
82 Heliotropium Greggii, Torr. 
168 Krynitzkia heliotropioides, Gray. 
623 floribunda, Gray. 
184 pusilla, Gray. 
185 Dichondra argentea, Willd. 
617 Ipomoea cardiopliylla, Gray. 
340 longifolia, Benth. 
291 Cuscuta obtusiflora, HBK. 
200 Nicotiana glauca, Graham. 
667 Solauum tuberosum, L., var. boreale, 
Gray. 
668 Jamesii, Torr. 
153 triquetrum, Cav. 
604 heterodoxum, Dunal. 
317 Physalis microphysa, Gray, n. sp. 
15 hederaefolia, Gray. 
342 Margaranthus solanaceus, Schlecht. 
687 Leucopbyllum minus, Gray. 
179 Pentstemon puuiceus, Gray. 
656 Lamouronxia eoeeinea, Gray, n. sp: 
282 Buchnera pilosa, Benth. 
647 Seymeria virgata, Benth. 
226 Castilleia Integra, Gray. 
209 Mexicana, Gray. 
78 Aphyllon Ludovieianum, Gray. 
333 Elytraria tridentata, Vahl. 
66 Calophanes decumbens, Gray. 
65 Carlowrightia pubens, Gray. 
695 oi'u.ta, Gray, n. sp. 
673 Ruellia Parryi, Gray. 
268 Anisacanthus insignis. Gray, n. sp. 
325 Bouehea Elirenbergii, Cham. 
37 Lantana macropoda, Torr. 
270 Verbena canescens, HBK. 
12 Teucrium Cubense, L. 
275 Poliomiutha incana, Gray. 
133 Hedeoma costata, Gray. 
654 Salvia lanceolata, Willd. 
637 Graham!, Benth., var. 
659 ballotteflora, Benth. 
166 Scutellaria Drummondii, Benth. 
665 Boerhaavia paniculata, Rich. 
685 anisophylla, Torr. 
693 gibbosa, Pav. 
101 Acleisantlies longiflora, Gray. 
671 Wrightii, Benth. & Hook. 
652 Selinocarpus chenopodioides, Gray. 
77 Abronia turbinata, Torr. 
75 cyeloptera, Gray. 
341 Paronychia Wilkinsoni, Watson, n. sp. 
295 Alternanthera Achyrantha, It. Br. 
689 Gossypianthus rigidiflorus, Hook. 
315 Gomphrena nitida, Rotlir. 
348 Iresine celosioides, L. 
141 laxa, Watson, n. sp. 
345 Dicraurus leptocladus, Hook. f. 
670 Atriplex elegans, Dietr. 
169 Eriogonum tenellum, Torr. 
285 atrorubens, Engelm. 
680 Jamesii, Torr. 
644 polycladon, Benth. 
681 Abertianum, Torr. 
284 Wrightii, T. & G. 
9 Aristolochia brevipes, Benth. 
899 Euphorbia pycnanthema, Engelm.? 
187 lineata, Watson, n. sp. 
672 Preslii, Guss. 
115 Brasiliensis, Lam. 
286 polyclada, Boiss.? 
81 serpyllifolia, Pers. 
80, 327 stictospora, Engelm. 
269 hirtula, Engelm. 
156 antisyphilitica, Zucc. 
630 dentata, Michx. 
326 adenoptera, Bertol. 
67 radians, Benth. 
264 Croton fruticulosus, Torr. 
140 suaveolens, Torr. 
155 Jatropha spathulata, Muell. 
322 ACalypha Neo-Mexicana, Muell. 
128 Stillingia biearpellaris, Watson, n. sp. 
172, 353 Quercus undulata, Torr., var. 
pungens, Engelm. 
74, 355 Q. undulata, Torr., var. breviloba, 
Engelm. 
134 Ephedra pedunculata, Engelm. 
38 aspera, Engelm. 
632 Spiranthes cinnabarina, B. & II. 
72 Hectia Texensis, Watson. 
7 Agave falcata, Engelm. 
157 heteracantha, Zucc. 
22 Wislizeni, Engelm. 
158 asperrima, Jacobi. 
149 Dasylirion Wheeled, Watson. 
