Page. 
CEnothera .......2....2... 114 
Oligomeris .............-. 23 
ONA®RARIES .........024- 113 
Opuntia .................. 134 
Orpine family. ............ 109 
Oxalis .................02- 51 
Oxytropis........2........ 84 
Pansy -.........20.-00.005 25 
PAPAVERACE® .........-. 12 
Parkinsonia .............. 94 
Parsley family............ 138 
Parsnip.............. e---- 141 
Partridge pea ............ 92 
Passiflora...............-- 121 
PASSIFLORACEH .......... 121 
Passion-flower............ 121 
Passion-flower family..... 121 
Pastinaca................. 141 
Pavonia .................. 43 
Pear................. «---. 106 
Peganum................. 53 
Pennycress ............--6 20 
Peppergrass .............. 20 
Pepperidge.-.......... we. 151 
Pepperwort...... owe eeeee 20 
Petalostemon............. 79 
Peteria .........2...2..2-. 80 
Peucedannm.............. 142 
Phaseolus ................ 89 
Philadelphus ............. 108 
Physocarpus.............. 104 
Pin-clover ................ 51 
Pink family. ............2. 28 
Pinweed ............-..... 24 
Pistacia .............2-244 67 
Pithecolobium............ 101 
Plum ........-...2..2..0008 102 
Poison ivy...-............ 68 
Poison oak................ 68 
Polanisia ................. 23 
Polygala ................. 26 
POLYGALEA .........00--4 26 
Poly temia..............25 141 
Poppy family............. 12 
Portulaca......---.....000 3L 
PORTULACACE........-.. 31 
Potentilla .........02.22.. 106 
Praitie clover ............ 79 
Prickly ash...-..-.2...... 53 
Prickly poppy..-......... 12 
Pride of India............ 55 
Proserpinaca ..........-.. 111 
Prosopis. ......-.-.--..005 95 
Prunus .............0..... 102 
Psoralea. ..............--. 75 
Ptelea.....22...2..02..00. 54 
Pulse family.............. 68 
Purslane ......... seenees . 31 
Purslane family .........- 31 
Pyrus .........--..22...2. 106 
Quassia family............ 55 
Radish.................02. 22 
RANUNCULACES .......... 6 
INDEX. 
Page. 
Ranunculus ............-. 8 
Raphanus ...........2.006 22 
Raspberry..........2..2.. 104 
Rattle-box 2.2.0.0 .0.02 2200. 2 
Red-bud .......2. 22.2222. 91 
Red-root.............222-4 60 
RESEDACEH .....--2-2.22. 23 
RHAMNEA .......00-00-00e 57 
Rhamnus................. 59 
Rhus ........200. 20.000 20. 67 
Rhynchosia .............. 91 
Ribes.........0 20.0 22.000. 109 
Robinia...........22..22.. 81 
Rock-cress .......-.-.2.0. 19 
Rock-rose ...........----6 24 
Rock-rose family ......... 23 
Rosa..... ene cece ew enee 106 
ROSACEH...........22.... 101 
Rose. 2... scene cece ees cee 106 
Rose family ...........--- 101 
Rose-mallow...........-.. 43 
Rotala..........-. 22.0000. 111 
Rubus..... eee ewww ee ee 101 
Rue family ...--.......... 52 
RUTACER .........202..-. 52 
Sacred bean .............. 11 
Sageretia ..-.............. 60 
Sand spurrey.....-.....-. 30 
Sandwort................- 30 
Sanicle ........cc00--2006- 145 
Sanicula.............220-- 145 
SAPINDACEA......0.00.000 64 
Sapindus ........ eeee snes 66 
SAXIFRAGACEE .......02.. 107 
Saxifrage family .......... 107 
Schetferia...........0000. 57 
Schrankia ............... 98 
Screw-bean............... 95 
Sea purslane ..... eeecceee 137 
Sedum..............2..00, 110 
Senna ..-2-- 22... eee eee 91 
Sensitive briar ........... 98 
Sensitive plant ........... 92, 96 
Serjania ........ce0e-eeeee 65 
Sesbania..........2. 2.020. 81 
Sessuvium................ 137 
Sheperd’s purse .......... 20 
Shrubby trefoil........... 54 
Sicyos .......---.-----.... 125 
Sida ...............002000. 39 
Sidalcea ......-22-........ 37 
Silene ..... @ cmcerecceecnne 29 
Silky cornel .............. 150 
SIMARUBACEA .........00. 55 
Sisymbrinm .............. 16 
Sium .-.--..-2.... 222.20. 146 
Soapberry... ............ 66 
Soapberry family......... 64 
Sophora ......-........... 72 
Sour-gum tree............ 151 
Spatter-dock.............. 12 
Sphecralcea ............... 38 
Spindle-tree .......-.. 2... 57 
Spirwa .........22..-2..- 103 
III 
Page 
Spotted cowbane ......... 147 
Spurred butterfly-pea..... 87 
Staff-tree family..... weaee 56 
Starwort .........2....2-. 29 
Stellaria .....0 0222... eee 29 
Stenosiphon .............. 119 
STERCULIACEE ........... 44 
St. John’s-wort........... 34 
St. John’s-wort family... 34 
Stone-crop...........222.. 110 
Storksbill .....2...2...0.. 51 
St. Peter's wort........... 34 
Strawberry bush ..-...... 57 
Strawberry cactus........ 132 
Streptanthus ............. 19 
Sumach ................2- 67 
Sumach family ........... 67 
Supple jack.............2. 59 
Sweet clover.............. 73 
Synthlipsis ............... 21 
Svringa......... see eee e ee 108 
Talinopsis ..... wee ene eeee 32 
Talinum ........0.-.cceee . 32 
Tamarise .........-..cec0e 33 
Tamarise family .......2.. 33 
‘TAMARISCINEA ........2.. 33 
Tamarix .....00. 022 .eeccee 33 
Tansy mustard ........... 16 
Tare ..-. 2. eee eee 86 
Tephrosia ................ 80 
Thalictrum............... 7 
Thamnosma .............. 53 
Thelypodium ............. 15 
Thimbleberry ............ 104 
Thlaspi............. 0.000. 20 
Tick-trefoil............02. 85 
Tilia. 2.22. eee. ee eee ee. 46 
TILIACEM.........2.00222. 45 
Tilla oo... cece eee eee ee 110 
Tissa ...2-.2 2. eee eee eee 30 
Tooth-ache tree. .......... 54 
Torchwood ............... 54 
Tornillo ..-.2- 2.2... 95 
Trepocarpus.............. 140 
Trianthema .............. 137 
Tribulus........... eeeeees 49 
Trifolium................. 74 
Tupelo .....-..........2-- 151 
Turnera..... ws owenes secnes 121 
TURNERACEA..........-0 120 
Turnip ......----2........ 16 
UMBELLIFERA ........ «--- 138 
Ungnadia..... aacecccesee. 66 
Urvillea ........2.....0008 64 
Vetch ......--.--......... 86 
Vetchling ..........0..... 87 
Vicia .. 2-2. eee eee eee 86 
Vigna ........ eee eee seen 90 
Vine family .............. 61 
Viola .......scceeee eee cene 24 
VIOLARIEA . 2.222220. eee 24 
Violet .......ceceeceeseee : 24 
