26 MINNESOTA STUDIES IN PLANT SCIENCE 



2-3 cylindrical cells, their glands oblong to orbicular, of 2-4 superposed 

 cells. Leaves ovate to oblong-ovate, 2-6 cm., glabrous above, lanuginous 

 beneath, shallowly serrate- to crenate-dentate, tapering to a narrow petiole- 

 like base about equalling or longer than the blades ; ciliolate. Scapes about 

 15 cm. high, sparsely short glandular pubescent, branching above into a 

 widely spreading cor\^mbose inflorescence, the branches rigid and slender, 

 arising from the axils of rather small glabrous, lanceolate bracts which are 

 broadest below the middle, the upper greatly reduced. Perennial from a 

 stout fibrous-rooted caudex which is sometimes branched. 



Aspect of S. aequidentata, but differs from that species in having a 

 deeper receptacle, bright purple, slender-beaked follicles, shallower toothed 

 leaves, small petals, and orbicular rather than elongate-oblong glands on the 

 hairs (Plate IX). 



Distribution. — Known only from the type locality. 



Specimens examined: 



Washington: damp rocks, west Klickitat County, April 9, May, 1883, W. N. 

 Suksdorf (USNH 45806) ; Type! Right-hand specimen designated "a." Originally 

 identified as S. nivalis L. and referred to by Engler and Irmscher to S. aequidentata 

 Small. 



Saxifraga laevicaulis sp. nov. 



Receptaculum ovarii basi adnatum, carpidia conica supra basin latis- 

 sima, superne stylis attenuatis maxime contracta supra basin glandula dila- 

 tata cincta dorsale uno-costata ; filamenta subulata ; sepala patentia ; parva 

 petalis multo breviora; petala elliptico-oblonga, 2.5-3.7 mm.; folia basalia 

 ovata repando- vel sinuato-dentata, petiolis brevibus; scapus glaberrimus 

 gracilis purpureus ramis corymbosis paucifloribus. 



Carpels bottle-shaped, broadest at the gland, strongly contracted above 

 into slender beaks, stvgmas subglobose. Gland an irregular lobed collar 

 above the base of the carpels; filaments subulate, rather slender, sharp- 

 pointed; anthers short and broad to elongate, yellowish. Sepals 1.3-1.7 mm. 

 oblong to ovate, rounded at apex, mucronulate by the projecting mid-nerve, 

 dull green, thin, slightly united at the base, lateral nerves 2, reaching to 

 middle or uniting with mid-nerve at apex. Petals 2.5-3.7 mm., much ex- 

 ceeding the sepals, obtuse to rounded at apex, oblong to elliptic or some- 

 times ovate, sometimes slightly notched; mid-nerve with 2-3 alternate 

 branches arising at or below the middle, these variously branched and their 

 branches more or less anastomosing. Receptacle very shallow, adnate 

 merely to the base of the carpels. Leaves 1-4.5 cm. long, tj^jically ovate, 

 the smaller sometimes elliptic, thin, green, glabrous, acute to obtuse, shal- 

 lowly dentate or sinuately dentate or repand, especially towards the apex, 

 contracted into slender petioles which mostly exceed the blades. Scapes 



