50 INDEX. 
Page. 
Rrairie sune Grass <<a ewe ee eee ee Tae yee OE ee a eee 1654775 22 
Purshia-tridentaia - 2.225 RE LLS So. ee Soe Sos ee ee 23 
Pyrus sambucifolia 5.0222 SS 8. 2 eee 23 
Rayless solden=rod c2xee. es a ee ie ee sete es: 17,19; 25 
RRECMSAGE a uF Sass SEN AS SEE ee Re eS eh aes ae 25) 27 
Rte p 2 Se Se i es er a 
RAVES CUT UiTs <a ee oc Fe Re Se Ee ee 5} 
COTCUM SS Ben Se See ea eT ee ee See SOR Sa tags Serpe i ee 23 
LQGUSUre . Oo Sa 3 SS Et Bs 33 ee eee 23 
WULCWIN. Sots Re ee eee eee eee 23 
Rtas away ae ee ae Shes le ot 
Sry ite! 6) Gb 1s) | ae ieee Rep eee A ee eee Banger et ered Sobel = ies See ok Pee a) es, = 17,31 
Salitbush:< 2135-5 52 fe Se eee ee ee 18, 24, 25, 27 
WAILORASS co 3 aS: Lee Ss ee eee eee 18, 24, 25, 38, 43 
Sandbere’s bluevrass 22 Se as Se ae ee ee 16, 20 
sarcobatus verimculaluss2 oe oe Dns SSI ee ye eee 24, 25 
—SCLEPUS CULETICANUS — > 2 OES Se is Ree ee 2oy LOS 
CONPCSITIS 2 oa S35 a ee a ee ees i ee ee 25, 36 
la@uslis.2 3 2 S53.) 333 Js Saas oe ee ee ee 36 
OLN CY i aS a ew ear po ec nef ee 25 
ecolochlog, Jestucacea SL 2 a eh ee eee ee 36, 43 
SCTOPRULAMIOOFUNOCOTPUS 5. a as Pe ee ee 22 
CCUM MOUGLASIE Sec 8 te ee So ee ee ee 22 
Service: Derry. 325-2. oo = See eee Se ee 23 
DEE 1 ESC UC ob TD eee ee Hs a ee ea ae 175.20,255 27 
Shonrieawned: brome. oe a Se ee eee ee eee 21, 34, 45 
Six weeks Orass.. [o5. stkeese a ee eer 41 
SHATHON ALONG OLNUN eres PRE SE os a Ue i BO ee eee 21, 24 
VIN OSUIN oe Ee ene 24 
Dlendierteseue. o122 8. ie a See ee ee ee eee 41 
smiallicord gras. - 22 ck sas eek de Oe ee ee 30 
SnOw Derry <6 FS Re e  ee eee 23 
Snow brush is= eo Se Se as 2 Se a a ee 2] 
PATTING GTOCUIS oa oe eS ee ae eee eee 30 
Sprrostachys occidentalis, 3 Si = Se ee ee eee 24,25 
Sprangle top. 2a 25 PSs es Sd ee Oe ee eee 36, 48 
Squirrel=tail crass 2:2 5-7 Aire eee es ee eee eee 26, 41 
WLPAISP = i sees oe a Ee, eee 41 
COlUMbIQNG Ss. Don oes SS ie eS eee 16 
WL OMISU ee Re ee eee ee 16 
ihiurberiand 2. SS Se ee ee eee 20, 21, 24 
VITIGULA s 2 OS NS Le See Se ee Ee Se eee ee 21 
pucedas. =. sis 2255S sees ee Se Be ree 24 
SYMP LOTIOCAT US OTreopPlUUS 22 ee Ee ee eee 23 
Tetradymiit Canescens =. 82. so | ee ee ee So a ae 20; 25 
SPUNOSE 22 555.25 BESSA Se eee eee ee 25 
Pulletia: JUSCW- SX =o nS 22 en 2 See Se ee ee 43 
Eimiothiys .<..S26s-55 be es a ae 21, 28, 31, 43 
LPrifoltum alas. 22. Se ss se eo SS ee ee 21 
beckwithitss2s.2 3 soe eS ae ee ee 21,36 
cyathiferume = 2. sce Fos eS SS ee ee 21, 36 
mnvolucraiuni .- eS eS Se ee ee 21E 36 
microcephahunt 2222225 33.5. 4 jos ee ee ee 36 
PHUMOSUNT 35.2 x gBo eS a Re ee ee eee 2) 
