South American vervain, 



1397 

 Southern 



-black-haw, 1556 



-blue-flag, 682 



-clubmoss, 39 



-cypress, 81 



-lady fern, 67 



-marsh fern, 72 



-red oak, 785 



-rein-orchid, 703 



-sugar maple, 1105 



-swamp lily, 671 



-twayblade, 713 



-water-hemp, 864 



-wild-rice, 280 

 Southwestern black willow, 



759 

 Spanish 



-mulberry, 1395 



-needles, 1672 



-oak, 785 

 Sparganiaceae, 89 

 Sparganium, 3, 10, 89 



americanum, 93 



androcladum, 93 



angustifolium, 93 



emersum, 91, 93 

 multipedunculatum. 

 93 



eurycarpum, 91 



minimum, 91 



multipedunculatum, 93 



simplex, 93 

 Sparsely-flowered bog- 

 orchid, 709 

 Spartina, 4, 259 



alterniflora, 262 

 glabra. 262 



cynosuroides, 262 



gracilis, 265 



patens, 265 



pectinata, 265 

 Suttiei, 265 



spartinae, 262 

 Spatter-dock, 906 

 Spearmint, 1446 

 Speedwell, 1490 



purslane-, 1491 



water-, 1493 

 Spergula platensis, 899 

 Spergularia, 899 



echinosperma, 900 



marina, 900 



platensis, 899 



salina, 900 



salsuginea 



bracteata, 900 

 Spermacoce, 1551 



glabra, 1552 



tenuior, 1552 

 Spermatophyta, 79 

 Spermolepis, 1220 



divaricata, 1220 

 Sphagnum moss, 4, 5 

 Sphenoclea, 1572 



zeylanica, 1572 

 Sphenocleaceae, 1572 

 Sphenopholis, 218 



intermedia, 220 



obtusata, 218 

 Spider flower, 987 

 Spider lily, 596, 666 

 Spiderwort, 596 

 Spiderwort family, 593 

 Spike 



-bentgrass, 234 



chicken-, 1572 



-trisetum, 222 

 Spikemoss family, 41 

 Spikemoss, meadow, 41 

 Spikerush, 3, 366 



creeping-, 381 

 Spilanthes, 1649 



americana 



repens, 1649, 1651 



repens, 1651 

 Spinach, French, 851 

 Spindle-root, 1184 

 Spindle-tree, 1103 

 Spiny 



-cocklebur, 1646 



-pigweed, 861 



-rush, 615 

 Spiral-orchid, giant, 730 

 Spiral-orchid, lace-lip, 730 

 Spiranthes, 5, 723, 730 



brevilabris, 730 



cemua, 727 

 cernua, 727 

 odorata, 727 



gracilis 



brevilabris, 730 

 floridana. 730 

 gracilis, 727, 730 



graminea, 732 



laciniata, 732 



longilabris, 730 



praecox, 730, 732 



Romanzoflfiana, 724 



vernalis, 732 

 Spirodela, 3, 4, 564 



oligorhiza, 564 



polyrhiza, 564 

 Sporobolus, 169. 250 



flexuosus, 252 



indicus, 252 



Poiretii, 252 



texanus, 250 



virginicus, 252 



Spot-flower, creeping, 1649 

 Spotted 



-cowbane, 1237 



-primrose, 1197 



-touch-me-not, 1108 

 Sprangletop, 252 



bearded-, 253 



red-, 256 

 Spreading pogonia, 719 

 Spring 



-bentgrass, 228 



-buttercup, 941 



-cress, 968 



-herald, 1308 



-ladies's tresses, 732 

 Spurge family, 1082 

 Spurred gentian, 1327 

 Squaw-huckleberry, 1269 

 Squaw-weed, 1689 

 St. Andrew's-cross, 1128 

 St. John's-wort, 1129 



family, 1127 



marsh-, 1140 



shrubby-, 1133 

 St. Peter's-wort, 1128 

 Stachys, 1367, 1429 



agraria, 1431 



crenata, 1431 

 albiflora, 1431 



floridana, 1433 



Nuttallii, 1431 



palustris, 1431, 1429 

 nipigonensis, 1431 

 pilosa, 1431 



tenuifolia, 1431 

 Staff-tree family, 1 103 

 Stagger bush, 1276 

 Star-glory, 1355 

 Star-grass, 660 

 Starflower, 657 

 Starwort, 893 

 Steironema 



ciliatum, 1292 



lanceolatum, 1292 



pumilum, 1292 



radicans, 1292 



validulum, 1292 

 Stellaria, 893 



gonomischa, 894 



longifolia. 894 



longipes, 894 



umbellata, 893 

 Stemodia, 1468 



durantifolia, 1468 

 Stenophyllus, 400 

 Sterculiaceae, 1125 

 Stick-tights, 1668 

 Stickseed, 1389 

 Sticky hedge-hyssop, 1467 



1772 



