IT)!, 354 Houstonia fasciculata, Gray. 
1(), 356 polypt'emoides, Gray, n. sp. 
142 Randia Pringlei, Gray, n. sp. 
314 Crusea subulata, Gray. 
661 Galium Rothrockii, Gray. 
669 Ageratum corymbosum, Zuccagni. 
6771 Stevia salicifolia,Cav., var. uana,Gr. 
677 steuopbylla, Gray. 
602, 639, 653 S. serrata, Cav. 
247 Eupatorium Greggii, Gray. 
600 Wrigbtii, Gray. 
273 solidaginifolium. Gray. 
135 Parryi, Gray. 
266 petiolaris, Mocino. 
613 occideutale. Hook., var. Ariz- 
onicum. Gray. 
608 Carminatia teuuitlora, DC. 
628 Brickellia laciuiata. Gray. 
605 Wrightii, Gray. 
350 oHgauthes, Gray. 
635 oligantbes, var. crebra. Gray. 
609 Wislizcni, v. pauiculata. Gray. 
323 Wislizeni, var. brevifolia,Gray. 
606 floribuuda, var. amblyolepis. 
Gray. 
641 simplex. Gray. 
181 Palmeri, Gray. 
610 veroniciefolia. Gray. 
210 spinulosa. Gray. 
143 (jluiinosa. Gray, n. sp. 
649 Kubnia rosmarinifolia. Gray. 
346 Barroeta subuligera. Gray. 
313 Gymnosperma corymbosum, DC. 
337 Gutierrezia Eutbamiaj, T. & G., var. 
microcepbala, Gray. 
622 spbaerocepbala, Gray. 
674 Heterotbeca Lamarckii, Cass. 
684 Aplopappus spinulosus, DC. 
338 Solidago Canadensis, L., var. canes- 
cens, Gray. 
175 Aphantostepbus bumilis. Gray. 
303 Achmtogeron pinnatijidum,Gray,n.sp. 
14 Psilactis brevilingulata, Scbult. Bip. 
288 Aster besperius. Gray. 
205 Cbaetopappa modesta. Gray. 
634 Couyza gnapbalioides, HBK. 
336 Coulteri, Gray. 
335 sopbiicfolia, HBK. 
281 Baccbaris Bigelovii, Gray. 
619 tbesioides, HBK. 
700 angustifolia, Micbx. 
675 glutinosa, Pers. 
18 Gnapbalium Sprengelii, Hook. AArn. 
362 Wrigbtii, Gray. 
305 Pringlei, Gray, n. sp. 
678 GuardiolaTulocarjjus, V. arguta,Gray. 
631 Partbeuium lyratum. Gray. 
297 Melampodium bispidum, HBK. 
10 longicornu. Gray. 
280 Iva dealbata. Gray. 
279 ambrosisefolia. Gray. 
278 Hymcnoelea monogyra. Gray. 
289 Ambrosia aptera, DC. 
192 Franseria tenuifolia, Gray. 
316 Zinnia pauciflora, L. 
624 Sanvitalia Aberti, Gray. 
650 angustifolia, Eugelm. 
42 Varilla Mexicana, Gray. 
309 Zaluzania discoidea. Gray, n. sp. 
148 Gymuolomia tenuifolia, B. & H. 
615 multillora, Bentb & Hook. 
152 Perymenium parvifolium. Gray. 
129 Heliantbus laciniatus. Gray. 
292 Flourensia cernua, DC. 
645 Viguiera linearis, Scbult. Bip. 
603 cordifolia, Gray. 
676 decurrens. Gray. 
41 Zexmenia brevifolia. Gray. 
349 podocepbala. Gray. 
321 Encelia exaristata. Gray. 
646 Ihlianthella Pringlei, Gray, n. sp. 
657 Verbesina Chihualtuensis, Gray, n. sp. 
620 Heterospermum pinnatum, Cav. 
193 Bidens pilosa, L. 
683 Galinsoga parviflora, Cav. 
638 Tridax bicolor, Gray. 
71 Riddellia tagetina, Nutt. 
183 Perityle Parryi, Gray. 
308 Babia biternata. Gray. 
607 Scbkubria Wrigbtii, Gray. 
343 Florestiua tripteris, DC. 
136 Actiuella scaposa, Nutt. 
190 Helenium microcepbalum, DC. 
83 Flaveria re pan da. Lag. 
6 Cbrysactinia Mexicana, Gray. 
307 Dysodia cancellata. Gray. 
643 Hymenatberum polycbtetum, Gray. 
262 Tburbcri, Gray. 
204 pentacluetum, DC. 
627 Tagetes micrantba, Cav. 
207 Poropbyllum scoparium. Gray. 
648 Pectis tenella, DC. 
626 Artemisia Mexicana, Willd. 
304 dracunculoides, Pursb. 
625 Ludoviciana, Nutt. 
296 redolens. Gray, n. sp. 
195 Senecio saliguus, DC. 
663 multilobatus, T. & G. 
130 Perezia Wrigbtii, Gray. 
13 nana, Gray. 
180 Trixis angustifolia, DC. 
614 Lobelia fenestralis, Cav. 
137 Fraxinus cuspidata, Torr. 
694 Macrosipbonia Berlandieri, Gray. 
