228 



ToiT. aiul A. IVOvV////// Gray replace otlier arteniisias, and DaJ<<t nana 

 '1\hv. and />. laiiata ii[neii^^. are found ('oiimion in place of other mem- 

 bers of tliat geims. All of these have either finely dis:.ccted leaves or 

 great woolliness, ()r both. 



Of the sedges Cyperns l:^<-}nr('lnlt.:il Torr. seems to 1)6 tlic jnost com- 

 inon in sandy wastes. From what I am ;d)le to Icarii from (tther sources, 

 howt^ver, it is a species that seiMiis to be quite generally distiibnted 

 everywluMe. In tliis eonne(;tion it may he oi' iiit(Mest to iu)te a diflfercm^e 

 in habitat between (Ji/perus HchicHaitzii Torr. and C Jlonghfoni Torr., 

 which two species have only recently been Si^parated by ])r. Britton. 

 (IbiUetiii Torr. Bot. Club, vol. xviii. ]>. .UIS.) 1 have noted both species 

 iu nmny places all over the Southwest, and, while the former is quite 

 common in santly wastes, 1 have never once noted (J, Houghtoni in 

 such localities. 



lioxfehnut Mrmita Lag. is the donn'nant grama grass in the Xeutral 

 Strip; and iu western Texas ami eastern Xew Mexico the "black 

 granm" grass, B. eriopoda Torr., becomes quite common. Of the ferns 

 Ckcilanthes Lindheimcri Hook, is a good example of a characteristic 

 western form. It is extremely villous to tomentose, found growing 

 iu abundance among the rocks of the mesas in the Cimarron canons. 



To name all other species characteristiii of these sandy regions, taken 

 at random fi'om various genera atid (uders, would re([uire a long list, 

 which \v(»nld probably be botl; needless and uninteresting. Tlence I 

 shall name oidy a, few of the m()st striking c\ami)les: llcliotropinm 

 convoIriilaccKm (J ray, a siH'cies covered with stilf, apjuessed hairs, 

 which 1 have invariably found growing in almost iniresand; lied/whUa 

 liexnoHO Vasey, a grass with sleinlcr, rigid leaves, seemingly restricted 

 even to "blow outs" in sides of sand hills; D'lplachne riglda Vasey, a 

 grass having, as the name implies, a very rigid, thickened stem and a 

 few short, narrow, rigid leaves; H}im<'no}i(tppu>iJl(ireHcen>i Gray, a species 

 wlute tonicntosc, common in southwest Kansas and Xcutral Sti'i]»; 

 FrtniHvrut discolor Nutt., hispid liairy, iu Seward ( 'onnty, Kans, ; rid/fal- 

 ter is Tc.rana Gruyy ApJfqhtpputi rnl/igi nosn.s Tow. and Gray, and yl. dirar- 

 ivatiiH (5 ray, all viscid-pubescent or woolly, with rather narrow leaves; 

 Krj/nitzlia flamesH Gray, aiul A', crassi.sepahr Gray, both extremely 

 rough, his])id, or tomentose, in southwest Kansas and south westward; 

 LyenruH phU'oides HBK., a grass somewhat similar in texture to the 

 graTua grasses, among the mesas in Neutral Strip; ForiuJaca pilosa L., 

 common in the Panhandle and in sandy wasters at Wichita, Kans.; 

 Jii.sciifclld W'i.slizcni IJcuth. and Hook,, a densely woolly crucifer, common 

 in the Panhandh^ and found iu southwest Kansas; Uriogonum unnnum 

 Nutt., E. (datum Torr., K. htclntogi/iiniii Torr,, h\ 'Idnn'sli Bonth., in 

 fact, nearly all the criogouuuis of the Great Plains, all pubescent to 

 (hnisi'ly tomentose, with few nairow leaves; besides all the various 

 cacti, with fleshy stems and no leaves; the mentzelias, with rough, 

 thickened leaves and hard stems; the aristi<las, stipas, yuccas, etc. 



