December 30, 1907 329 



tral cavity open, sonicvvhat cllii)lical in (Milliiic, altiiosl com- 

 pletely filled, slightly pubescent, especially on the short stout 

 beak, the narrow edges or "wings" slightly thickened. 



The type, in my herbarium, is no. 8578, collected May 28, 

 1907, above Crystal Springs, San Mateo county, California, on 

 the Half Moon Bay road, elevation 450 feet, growing in moist 

 ground in a grassy field; abundant. In general appearance this 

 large stout plant must resemble typical P. magita^ but appar- 

 ently has a very differently shaped fruit, the wings in that spe- 

 cies meeting below, while in this they do not even approach, 

 being very narrow on account of the filled cavity, which is hol- 

 low and empty in magna. 



Plectritis collina 



Glabrous annual: stems simple, 2 dm. high, pale: leaves in 

 about four pairs, the basal ones with slender margined petioles 

 6 or 7 mm. long, the blade nearly orbicular, between 2 and 3 mm. 

 across, the stem leaves sessile, oblong or oblong-lanceolate, blunt 

 or acutish, i to 1.5 cm. long, 5 mm or less wide: whorls of flow- 

 ers five or less: calyx linear-attenuate, about 5 mm. long: corol- 

 las white, nearly 4 mm. long, regular, 2 mm. across the open top, 

 the oblong rounded lobes i mm. long, spur very short and incon- 

 spicuous: stamens salmon color, as long as the tube: style ex- 

 serted nearly 2 mm. from the corolla, the 3-lobed stigma large 

 in proportion: fruit glabrous and smooth on the back, either 

 whitish or pale slate-color, somewhat clavate in shape, a little 

 less than 2 mm. long, and half as wide as long, the dorsal side 

 rounded, grooved, but not keeled, ventral cavity completely 

 filled, a slight pubescent line running lengthwise in the middle, 

 edees of the wino-s turned in and covering about two-thirds of 

 the ventral surface, irregular in outline, the space between them 

 wider at top and bottom than in the middle, where it is slightly 

 contracted bv the widenino- of the wings. 



