

EOSE MEXTCAI^ AND CP^XTRAL AMERICAK PLANTS. 109 



inner ones oiliate; petals white, veined witli red, 14 mm. long; fruit narrow, 3 cm. 



long, pubescent. 



U. S. Niitiunal Herbarium no. 4Gl-tG5, collected by C. G. Pringle and F. Lozano 

 near r>nena Vista Station, Hidalgo, altitude 2,550 meters, 1904 (no. 8994). 



Geranium pringlei Kose, sp. nov. 



Perennial; stems erect, about 30 cm. high, very pilose, especially at base, the upper 

 part of tlie stem and inflorescence witli iiumerous purple stipitate glands; basal leaves 

 long-petioled, white-pilose, especially below the blade, deeply lobed, each lobe cleft 

 and sharply toothed; stem leaves somewhat similar but shorter-petioied; peduncles 

 usually 2-no\vered; pedicels short, 1 to 2 cm. long, densely glandular-i)ubescent; 

 sepals lanceolate, faintly 3-nerved, the inner ones ciliate; j^etals blue, large; fruit 

 linear, pubescent, with stipitate glands. 



Type U. S. National Herbarium no. 461451, collected by C. G. Pringle in meadows, 

 Cuyamaloya Station, in eastern Hidalgo, altitude 2,490 meters, August 2, 1904 (no. 

 8978). 



OXALIDACEAE. 



INTRODUCTORY NOTE. 



The breaking up of Oxalis by Dr, J* K. Small ^ into several genera 

 has been varioUf^ly received by botanitsts. My own view of the sub- 

 ject is that his ground has been well taken and his treatment is followed 



in this paper, Oxalis proper is not found in Mexico, but all the segre- 

 gates made by Doctor Small are represented, and in addition to these 

 Bioph^'tum and Pseudoxalis, tlu^ latter here described for the first time. 

 For more than ten years I have been studying the Mexican material 

 of this famil}^ in which I have found many new species, some of them 

 here first descri})ed. 



SOME MEXICAN SPECIES OF lONOXALIS. 



In Mexico lonoxalis might well be called the harbinger of spring, 

 for it is one of the first plants to respond to the rains which break up 

 the long dry season and is the very first to give color to the landscape. 

 One ma}^ travel for many miles north of the City of Mexico and see 

 the high valleys and plains blue, pink, or white with lonoxalis while 

 most other vegetation has hardly started. -Of the 35 named species of 

 Oxalis credited to Mexico and Central America by Ilemslc}^ 15 belong 

 to this genus^ but the actual number is greatlj^ in excess of this figure. 



The genus has a wide range both horizontal and altitudinal. It is 

 scattered over the entire length and breadth of the country, reaching 

 from near the sea level to the tops of man}^ of the high mountains; it 

 grows on the open plain, in woods, in cultivated fields as a weed, on 

 nearl}' barren rocks, on diy exposed hillsides, and in sandy nooks 

 under the influence of the spra}^ of a waterfall Some species grow 

 on nearly perpendicular cliffs, others on the level so thickly set 

 together as to form a sod, while others are scattered or solitary. 



Tlie following comprise most of the Mexican species. 



« Flora of the Southca^^tern United States, p, 664. 1903. 



