INDEX. 



Names of orders are in CAPITALS; of suborders, tribes, &c, in small capitals; of admitted 

 genera and species, in ordinary Roman type; of synonyms, as also of subgenera, sections, and all species 

 merely referred to, in Italic type. 



Abrotanum, 369. 

 Absinthium, 369. 



vulgar e 7 370. 

 Acamptopappus, 64, 124. 



Shockleyi, 124. 



sphaerocephalus, 124. 

 Acantholaina, 250. 

 Acanthospermum, 60, 239. 



australe, 239. 



Brasilum, 239. 



hispidum, 240. 



humile, 240. 



xanthioides, 239. 

 Acanthoxanthium, 253. 

 Acarph&a, 342. 



artemisicefolia, 342. 

 Achceta, 288. 

 Achillea, 78, 363. 



borealis, 363. 



gracilis, 363. 



"lanulosa, 363. 



Millefolium, 363. 



muItiflora,363. 



occidentalis, 363. 



Ptarmica, 363. 



tomentosa, 363. 

 Achvrachaena, 69, 312. 



mollis, 312. 

 Ackyrcea, 124. 

 Achyropappus, 332. 



Woodhousei, 333. 

 Aciphylltea, 357. 



acerosa, 357. 

 Acmella occidentalism 258. 



repens, 258. 

 Acoma dissectum, 301. 

 Acosmia, 263. 

 Acourt-ia, 408 



microcephala t 409. 

 Actinea, 344. 

 Actinella, 75, 344. 



acaulis, 345. 



argentea, 345. 



biennis, 346. 



Bigelovii, 346. 



Brandegei, 345. 



chrysanthemoides, 345. 



Cooperi, 346. 



depressa, 345. 



glabra, 345. 



grandiflora, 345. 



insignis, 345. 



lanata, 330, 345. 



lanuginosa, 344. 



leptoclada, 345. 



linearifolia, 344. 



odorata, 347. 



Palmeri, 344- 



Rtehardsoniij 3-47. 



Richardsonii, 346. 



Rusbyi, 346. 



scaposa, 344. 



Torreyana, 345. 



Vasevi, 346. 

 Actinaphoria, 129. 

 Actinolepisj 328. 



anthemoides, 328. 



coronaria, 327. 



Zanostr, 329. 



Lemmoni, 328. 



multicaulis, 328. 



mutica, 328. 



nivea, 323. 



tenella, 327. 

 jraHace*", 329. 

 Actinomeris, 67, 289. 



alata, 287. 



alba, 289. _ 



alt emi folia, 289. 



helianthoides, 288. 



heterophylla, 288. 



longifoliu, 287. 



nudicaulis, 288. 



oppositifolia, 288, 289. 



paucijlora, 288- 



squarrosa, 289. 

 W riijhtii, 288. 

 vlch'wospermum, 302. 



angustifolium, 303. 

 Adenocaule^e, 59. 

 Adenocaulon, 59, 237. 



bicolor, 237. 

 Adenophyllum Wrightii, 357. 

 Adenosty'les Nardosmia, 376. 

 Adopogon, 412. 

 Adoxa, 7, 8. 



Moschatellina, 8. 

 JStkulin unijtora, 92. 

 Agarista, 299, 300. 



calliqpsidea, 300. 

 Agassizia, 351. 



suavis, 351. 

 Agnthyrsus, 443. 



Floridanus, 443. 



leucqphceus, 444. 

 Ageratum, 51, 93. 



altissimum, 101. 



cozlestinum, 93. 



conyzoides, 93. 



corymbosum, 93. 



lineare, 338. 



littorale, 93. 



maritimum, 93. 



Mex'icanum, 93. 

 punctatum, 92. 



Wrightii, 92. 

 Alarconia angustifolia, 268. 



helenioides, 267. 

 Alcina perfoliata, 449. 

 Aldama uniserialis, 256. 

 Alloseris, 412. 

 Alymnia, 238. 

 Amauria, 332. 



dissecta, 334. 

 Ainblyolepis, 76, 351. 



setigera, 351. 

 Amblyopappus, 73, 334. 



Neo-Mexicanus, 333. 



pusillus, 334. 

 Ambrosia, 63, 248. 



absynthifolia, 249. 



acanthicarpa, 251. 



aptera, 249. 



artemisiaefolia, 249. 



bidentata, 249. 



cheiranthifolia, 249. 



confertiflora, 250. 



coronop'ifolia, 250. 



crithmifolia, 250. 



elatior, 249. 

 fruticosa, 250. 



alandulosa, 250. 



heterophylla, 249. 



hispida, 250. 



integrifolia, 249. 



Lindheimeriana, 250. 



longistylis, 249. 



longistyliSj 250. 



paniculata, 249. 



Peruviana, 250. 



Pitcheri, 246. 



psilostachya, 250. 



pumila, 250. 



tenmfolia, 250, 449. 



(O7neniosa, 251. 



trifida, 249. 

 Ambrosie^e, 62. 

 Amellastrum, 172. 

 Amellus Carolinianus, 256. 



spinulosus, 130. 



■uillosus, 123. 

 Amida gracilis, 306. 



hirsuta, 306. 

 Ammodia, 124. 



Oregana, 124. 

 Ammogeton 



scorzonermfolium, 437. 

 Amphiachyris, 53, 116. 



