170 Covlllc. and Lciher;/ — Tico New Plants from Oregon. 



ends; the leaves not very stiff' and with only an aj)ru[>t, very 

 short, and scarcely ])ungent liorny apex ; and the sepals with 

 the green median portion rather narrow, usually abrut^ly de- 

 limited l)y the broad hyaline margins, and conmionl_y with little 

 tendency to l)e striate when dry. Arenarla acAileala is a ]ilant 

 with spreading, })rocumbent, matted stems retaining their more 

 scattered widely spreading dead foliage for several years; the 

 leaves stiff, tapering at the ajiex into an extremely sharp horny 

 spine; and the sepals with a broad midrib not usually sharply 

 delimited and when dry commonly 3 to 5-striate. In the field 

 the plants are at once distinguishable b}^ their strikingly differ- 

 ent habit and by the difficulty of handling acaleata, the leaves 

 of wdiich readily pierce the skin, a difficulty which was not ex- 

 perienced in the case of intviicola. 



Our plant is a characteristic species of the open slopes of 

 pulverized pumice-stone about the rim of Crater Lake, Mount 

 Mazama, Oregon, and specimens in the National Herbarium 

 collected by Lemmon in 1S75 show that it occurs also in north- 

 eastern California. Arenaria acidcuta ranges from the plateau of 

 northern Arizor.a through the mountains of Nevada and Utah 

 to those of southwestern Idaho and eastern Oregon. 



Our plant bears considerable resemblance to some herliarium 

 specimens which are refert"ed to Arenaria conf/esta sn.bcongesta 

 Wats., but the type of that complex of forms differs in its spread- 

 ing instead of erect leaves, slenderer and more persistently leafy 

 branches of the rootstock, longer calyx (about 5 mm.) and gla- 

 brous stems and intlorescence. 



Cardamiiie bellidifolia pachyphylla, v:ir. nov . 



Plant wholly (lovi)i(l of imbesceuce, low, 4 to S cm. lii.u;!i, from a l>ruiu"li- 

 iiig caudex commonly 2 nim. thick, and with a deep ta]) root, the branches 

 usually short, but sometimes long and fiexuous ; leaves mostly gathered 

 in subrosulate tufts at the ends of the caudex brandies, the blades fleshy 

 in texture, even the midrib nearly obliterated, 6 to 12 or even 16 mm. 

 long, obovate to narrowly oblong, rounded at the apex, entire or with 

 an indistinctly defined lobe on either side toward the apex, abruptly or 

 gradually narrowed into petioles 1 to 3 cm. in length and purplish at the 

 base or throughout ; flowering stems short, erect, 1 or 2 from each branch 

 of the caudex, 3 to 5 cm. high, leafless or bearing one or two short- 

 petioled oblanceolate or obovate leaflets ; inflorescence a short terminal 

 raceme, the flowers seldom more than 10, on jiedicels commonly 5 to 10 

 mm. long; sepals 2 to 3 mm. long; petals a little more than twice as 

 long, spatulate, obtuse, white or rose-colored-; siliques about 3 cm. long 



