38 MINNESOTA STUDIES IN PLANT SCIENCE 



possess the plantagineous leaves that might suggest the 5". plantaginifolia 

 of Hooker (In Parry's Second Voyage, appendix 394), although this form 

 of leaf is characteristic of the Norwegian specimen. Hooker's (16, p. 49), 

 description reads "foliis petiolatis obovato-spatulatis repandodentatis." In 

 a specimen cultivated by himself, Haworth (14) found the leaves to be 

 "lanceolata obfusa suhavenia crassiuscula," — not so different from Willde- 

 now's description "foliis oblongo-lanceloatis glabris repando-dentatis." 



Saxifraga franciscana (Small) Fedde, Just, Bot. Jarhesb. 33:1:613. 

 1906. 



Micranthes franciscana Small. N. Am. Fl. 22:2:144. 1905. 

 (Plates XI, VTII-X.) 



Specimens examined: 



Arizona: San Francisco Mountains, alt. 11,500 ft., August 27, 1889. F. H. 

 Knoivlton, No. 127, as S. nivalis L., referred to this species by Engler and Irmsche» 

 on sheet No. 258261 (USNH). 



The following specimen is doubtfully referred here: 



California: Mt. Goddard, Sierra Nevada Mountains, alt. 11,500 ft., July 24-26, 

 1900; Hall and Ch<mdler, No. 70y, as S. nivalis L. (UMH). This plant differs from 

 the above in having a wholly glabrous, purple, and taller (11 cm.) scape, and a fewer- 

 flowered, less compact inflorescence. The differences in the florjil characters are very 

 slight and difficult to detect. The beaks are shorter, and the gland seems to persist 

 as an inconspicuous flange above the base of the calyx. No seeds. 



Section Micranthes (Haw.) Tausch, Hort. Canal., fasc. 1. 1823. 



Micranthes Haw., Syn. PI. Succ, 320. 1812 ; as genus. 

 Boraphila Engler, Verb. Zool.-Bot. Ver., Wien. 19. 1869; in part. 

 Micranthes Small, N. Am. Fl., 22 :2 :132. 1905 ; in part. 



Ovary subinf erior ; receptacle bowl-shaped, shallow to deep. Gland 

 fleshy, broad, discoid, and almost completely enveloping the ovary, and 

 usually considerably raised above the base of the calyx, its surface at 

 length conspicuously convoluted and verrucose, and its lower margin persist- 

 ing as a distinct flange around each carpel. Carpels distinct, but connected 

 by the adnate receptacle and at least the basal portion of the gland. Fila- 

 ments subulate, flattened, uncinate. Sepals spreading or reflexed. Petals 

 lanceolate to orbicular. Seeds various, tuberculate to smooth, in some forms 

 winged. Inflorescence paniculate to corymbose, the cymules often glom- 

 erate. Hairs uniseriate, the glands various (Plates II, III, XII, XVIII). 



Haworth (13) founded his genus on Saxifraga pennsylvanica, distin- 

 guishing it by its "lorate" petals ("petala lorata distantia"). Tausch (30) 

 included S. nivalis L., apparently on the similarities in the calyx, but he 

 erroneously describes the seeds as smooth. Seringe (26) included 6". vir- 

 giniensis Michx., S. davurica Pall., and ^S*. hieracifolia W. and K., on the 



