35 



^'recently published species of uncertain affinities." It is close 

 to D. hespei'ium^ and no doubt included under that species by 

 Gray. Its relationship is well shown by its being- placed next 

 to D. hesperium in the Flora Franciscana, issued in 1891. 



Delpliiiiiiiiii rosenni 



Perennial, root fascicled, elongated, not tuberiforin: herbage 

 crisp like fresh lettuce, easily broken when fresh: stem hollow, 

 stout, about 6 dm. high, pale, leafy in the lower half, commonly 

 simple but sometimes with several flower-bearing branches, pu- 

 bescent with short hairs, some of them glandular: lower leaves 

 on pubescent petioles 1.5 dm. long, the upper ones shorter; blade 

 thin, bright yellow-green, nearly or quite glabrous except on the 

 margins, orbicular in outline, the largest 7 or 8 cm. across, 3- 

 parted, the divisions frequently uneven, again parted so as to 

 give the whole a 5-lobed appearance, the lobes coarsely several 

 toothed, these either broad and rounded or acutish, but all with 

 a short apiculation; sinus at the base closed by the overlapping 

 lobes; the two or three leaves just below the inflorescence much 

 reduced, composed of one or more lanceolate lobes: inflorescence 

 occupying the upper half of the stem: pedicels slender, ascend- 

 ing (erect in fruit) pubescent like the stem and leaves, the lower 

 ones in flower a little longer than the spur, the others equalling 

 it or shorter, each subtended by a small (2-4 mm.) lanceolate, 

 acuminate bract: flowers rose-pink; sepals ovate or elliptical, 

 1.5 cm. long, 5 mm. wide, spreading and not touching except at 

 the very base; spur about 1.5 cm. long, 3 mm. across, at first 

 somewhat curved, becoming nearly straight, a little pubescent: 

 upper petals whitish, ascending, 8 or 9 mm. long, 3 mm. wide 

 at the oblique base of the blade, the rounded apex 2 mm. wide, 

 sometimes slightly notched; lower petals colored like the sepals, 

 2 mm. shorter than the upper ones, apparently standing almost 

 horizontally, the blade obliquely ovate, 2 mm. wide, split nearly 

 to the middle, pubescent along the center: pods 2 cm. long, 

 I cm. wide, reticulated with dark veins, the aristate apices of 

 the divisions somewhat divereine: seeds immature. 



