PIPER—-FLORA OF THE STATE OF WASHINGTON, 63 
Along the limit of the meadows in what have been called “ pumice 
fields” a very different series of plants appear. Among the more 
characteristic are a lupine (Lupinus lyalli/), the curious Spraguea 
umbellata, an Eriogonum (£’. coryphaeum), Oreastrum alpigenum 
Erigeron aureus, and Polemonium elegans. 
The above description apples particularly to the Arctic Zone in 
the Cascade Mountains. The flora of the same zone in the Olympics 
is very similar, the principal differences being in the flora of the high- 
est peaks. In the Blue Mountains of Washington the Arctic Zone is 
very limited in extent. The arctic flora of these last mountains is, 
however, about as closely related to that of the Rocky Mountains as 
to that of the Cascades. | 
The following list shows the same comparative data as regards 
distribution as were shown for Hudsonian species: 
? 
Distribution of characteristic Arctic-Alpine species. 
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Agoseris alpestris...........-- wee eee cette cece eee cere eee) X | OX) X x | es 
Agoseris aurantiaca ....2.....0.2..2.020 0222 | X xX... X| KX) KX) xX] xX fll. Xx 
Agrostis humilis.............----.------------ eee X Meee. XOX Leelee.) x [eee eee. x 
Agrostis rossa@ ....22. 02... 222 2222-2 e ee eee eee le. ..| XX jee.) XK) XS wees) X |e... eee. x 
Allium validum.... 0 ..22....2-2..2--2--0-2.. ed ee ee Pe | X |e... ee. eee] X x |x 
Alsine calycantha..................-.-.2.-2.. x | - X|xX|X) xi. ae > 
Anemone drummondii...........-.-----.----/.... leeeel xf...) X ox.) x i) x) x) OX ll, 
Antennaria media .................-2....-4.. eeeeleeee x/|/x|x > x |x| x | xX |X .... X x 
Antennaria lanata ............-..2..--22-0--2 02 2c aes. x |X} X) X |... ..2.) x [elle Kl... 
Apargidium boreale........2........2.2-0005 | x | X lee) XK Lee eee xX lle ee eee cee 
Arabis latifolia ..........0....002...222-..---. ee ee ee Dees x |. a x |x 
Arabis lyallii............ 22.22 ..22..----2----- eee) X | xX |.e.] x | x x |x|... xX 
Aragallus monticola ............22...22.----- 0... lee eeeecelecee >, a x 
Arenaria capillaris.............2----..-------. x| xX) xX| xX) xX) xX Ll. x Xx 
Arenaria nuttallii. so... 02.2 eee eee eee XX j....).222) x xX XxX 
Arenaria sajanensis .........2.2--2.-2--------- x |x] xX |... eee. | Xl... ee. X je... eee x 
Arenaria verna... 02.222. 0..2-2--222202220-00-2- X leeee) X |eeeee xX |X X |X x xX 
Arnica parryi ...2.....2...2.22.2.-22-2------- 20n. XOX... XOX ee le. X loc. eee x 
Asplenium viride .................22......... Da |eceeleseeleeee cece 
Bikukulla uniflora ..... 22.22.22. 22-. 000200222 oe ce eee eee ee ee X j....| xX | x | x,| x | X x 
Calamagrostis vaseyi..........2.0..02002002020 020. eee x | X |X eeeeleccelecccleeesleeee sees cece 
Caltha biflora ........222...220222-------2---- Ox x I. x | X,| pa ed ee ee 
Caltha leptosepala .........0202...202. 000000. x|x x - x | x...) x | xx xT 
Campanula piperi.............-....--.-.----. 2... Jenee] X [e---|eeeeJe---]e- ee leeeeleeee ee eee 
Campanula seabrella ...... 22.22.2222. 222222 coe cece cee eee eee | X [...ej..ee/e.ee [eee X |.--.j.--- 
Cardamine bellidifolia ..........2.0.2..22.... > a pl. | x x|X x 
Cardamine kamtschatica ........2.0...20.... xX |x >Xx > a ee ee eee 
Carex breweri..........2......0. 0-202 eee wee cece cee wees x | x | x | X j.. x x 
Carex circinata .........2...2022.2.2.2.22---. a, ae ee |. *.| on ee ee eee 
Carex illota ...........000.0..02..0.2220-200-- XX) X .... XK) X wel ele. | xX | xX - 
Carex nardina .............2-.2-22 222-22 e ee eee X.-.-| X | X | XM fe... .. fee. l....) X : 
Carex nigricans ...............2..0.0-2002005- (xX > x) xX...) xX | x weeeleoee x |..../....) X . 
Carex pyrenaica ..................2-22..--0-. OX) xX) X/....) X | xX LeeLee. xX x| x . 
Carex spectabilis.............22..222020200005 (x x x 'x|x|x| x] x fi. x 
Carex vermacula .... 2.20... 202. e cee cece eee cee eee cece nee X sees cece cae Jeweelesse 
Castilleja oreopola .............--.2.2222 2222 eee | XX) XOX |... ee ee eee ee la eeeleese 
Castilleja rupicola 2.2.0.2... 000.0000 000022 cee eee eee eee ps Jewenleeeclecee cone 
Castilleja suksdorfii.......... 22.22.2220. 2 2222 ce eee ce eee eee X j...-[ X jess eee ee ee eee 
Claytonia megarrhiza................22..222-).020/2--- cece] Xo seeeeeee eee x |....j..2.| x |. 
Crepis nana .... 0.20... 0.2222 eee eee eee eee | X |eee. OX |e. eee X jee elee. X |e..e)eeee] XK). 
Dodecatheon jeffreyi................2..002---/eeee | x | X |..-- X | oX j....jeee. | X [eeee|eee| X |. 
Douglasia laevigata ................ 0.020022 e eee clan ee x |. x eee] x lll) lee ele. Loe. 
Draba aureola...........----. wee cee cee eee ee ee eee ee | x |-.-- - weefee ee! 0% |eneeleees 
Draba lemmoni ...............22-.00 2202 -eeee ee ee es eee OX |..eefeeee | x | weaelecee x. 
Draba lonchocarpa........--.--22002eeee eee ee eeeeteeee) XM |eeee) X | OX |eveelececleceeceeeleeee) X leeee 
