46 MINNESOTA STUDIES IN PLANT SCIENCE 



referred to Saxifraga fragosa, S. Sierrae, S. oregana, S. hracteosa, S. 

 plantaginea, and 6". nivalis. A single specimen from Forest Grove, Oregon, 

 (Prof. Joseph Marsh, No. 85) which appears the closest to S, integrifolia 

 Hook, as to leaf characters, differs radically from that species in carpels and 

 petals. In spite of the excellent delineations in Hooker's (16) plates the fact 

 remains that no such fruit or carpels occur in the entire section Micranthes, 

 as are portrayed in Figures 2, 4, and 5 of Hooker's Plate LXXXVI. 

 Hooker's figures fail to show the characteristic broad gland surrounding 

 the carpels and so generally well-marked in the section Micranthes; more- 

 over Figure 4 (and to less extent Figure 5) portrays the carpels as united • 

 above the middle, which is not the case except as they are adnate laterally 

 to the gland. This and the further fact that Figure 4 (and to less degree 

 Figure 5) portrays the carpels as seated in a deep receptacle are both con- 

 tradictory of the description "ovario omnino lihero" (A'ol. 1 :249). Figure 5 

 might well belong to such species as S. saximontana (Sect. Dermasea) or 

 S. rhomhoidea (Sec. Chionophila). No plants have been found that con- 

 form to Hooker's characterizations of the leaf-margins as "integerrimis" 

 (Plate XVI). 



The region about the lower Columbia River whence Dr. Scouler's plants 

 came needs to be thoroughly explored, and the original collection studied, 

 in order to establish the identity of this species. 



For the present Saxifraga hracteosa Suksdorf and its varieties are 

 included in this species. Better material is necessary to establish the exact 

 status of 5". hracteosa but as far as can be determined there is no essential 

 difference between it and specimens from the same locaXity that have been 

 referred to S. integrifolia Hook. 



Saxifraga laevicarpa sp. nov. 



Folliculis brevibiis inflatis laevibus purpureis receptaculo infra medium 

 insertis, stylis brevibus valde divergentibus vel recurvatis, glandula laeve 

 crassa angustata elevata, iilamentis subulatis superne attenuatis incurvatis 

 antheris parvis marginibus purpureis; sepalis virideis vel purpureis 2 mm. 

 longis angustatis cuneatis vel deltoideis base coalitiusculis acutis reflexis, 

 petalis 3-4 mm. longis purpureis perangustatis lanceolatis acutis 1-nerviis 

 base contractis; seminibus crassis ovatis saepe angulatis carinatis sulcatis 

 evidente tuberculatis. 



Follicles short, inflated, smooth, purple, inserted below the middle in the 

 receptacle; styles short, strongly divergent or recurved; gland smooth, 

 thick, narrow, elevated; filaments subulate, attenuated above, incurved, 

 anthers small, the margins purple ; sepals green or purple, 2 mm. long, nar- 

 row, cuneate or deltoid, somewhat united at the base, acute, reflexed ; petals 

 3-4 mm. long, purple, very narrow, lanceolate, acute, 1-nerved, contracted 

 at the base; seeds thick, ovoid, often angled, carinate, sulcate, tuberculate. 



