414 SUPPLEMENT. 



= Flowers racemose and much crowded (even in age) on the short axis or branches of the scor- 

 pioid cymes on which the slender and densely loug-villous pedicels are spreading at right 

 angles: sepals linear-spatulate, much longer than the globular capsule. 



P. pedicellata, Gray, p. 160. Collected in flower, with rounded or mostly subcordate 

 and petiolulate lobes to the leaves, in 1884, at Yucca, Arizona, by Marcus E. Jones. (Lower 

 California, as supposed, Dr. Streets.) 



= = Flowers spicately disposed, being sessile or short-pedicelled, and the fruit erect on the axis 

 or branches of the inflorescence : sepals equalling or moderately surpassing the capsule: all but 

 the later species more or less viscid or glandular, and heavy-scented, commonly more or less 

 pubescent or somewhat hirsute, not setose-hispid nor long-villous. 



a. Leaves all undivided, at most crenate-pinnatifid: stem strictly erect: seeds oblong-elliptical, 

 thickly papillose-roughened on the back, but without distinct reticulation. 



P. integrifolia, Torr., with var. Palmeri, p. 160. 



b. At least some of the leaves pinnately parted or lyrate : sepals not manifestly surpassing the 

 globular capsule : seeds roughish with obscure reticulations on the back, the ventral ridge or the 

 incurved margins, or both, becoming corrugate-tuberculate at maturity. 



P. crenulata, Torr., p. 160. A foot or less high : leaves variable, from elongated-oblong 

 to roundish in outline, from crenately pinnatifid or incised to pinnately parted into roundish 

 or oblong lobes, the lower pair often detached and even petiolulate : corolla from deep 

 violet-blue to " pale purple," with expanded limb commonly half-inch broad : stamens and 

 style exserted : seeds elliptical, the largest almost 2 lines long, at maturity corrugate-tuber- 

 culate on the ventral ridge and usually on the incurved margins. 



P. CSerulea, Greene. A span to a foot high, with the foliage and viscidity of the preceding, 

 less or not at all unpleasantly scented, much smaller-flowered : corolla only 2 lines high, pale 

 blue to purplish : stamens and style not exserted : seeds about a line and a half long, ob- 

 long-oval, nearly like those of P. crenulata. — Torr. Bull. viii. 122 (but seeds not "almost 

 linear," &c). P. invenusta, Gray, Proc. Am. Acad. xx. 303. — Common both in N. and S. 

 Arizona, in dry ground ; first coll. by Wright, &c. 



P. Arizonica, Gray, p. 394 of ed. 1. Depressed-diffuse, with ascending stems a span or two 

 long, cinereous-puberulent, very slightly viscid : leaves from deeply pinnatifid into closely 

 approximate and regular oblong and entire lobes (of 3 or 4 lines in length) to pinnately 

 divided and the segments pinnatifid: cyme naked-pedunculate, crowded: corolla white (or 

 at most with some blue lines), barely 3 lines high and broad : stamens and style well ex- 

 serted : seeds short-oval, a line or more long, thickly transversely corrugate-tuberculate down 

 the incurved margins and ventral ridge. — Plains of S. Arizona (and adj. Sonora), Greene, 

 Lemmon, Pringle, Parish. 



v. Leaves mostly pinnately parted, and below divided and the segments pinnatifid or incised: 

 sepals hardly longer than the capsule: seeds oblong or elliptical, flatter and thinner, not at all 

 corrugated or thickened on the margins, the whole surface conspicuously favose-reticulated with 

 smooth and even meshes. 

 P. glandulosa, Nutt. A span to a foot high, rather stout, viscidly pubescent or in the 

 inflorescence hirsute : primary segments of the leaves few-lobed or incised, or some entire : 

 flowers comparatively large : corolla violet or blue, 4 or 5 lines high, with ample rounded 

 lobes quite entire : stamens and style much exserted : capsule short-oval. — P. glandulosa in 

 part, p. 160. — Rocky Mountains of "Wyoming at the head- waters of the Colorado, Nuttall, 

 Geyer, and of S. W. Montana, Watson. Also at the head of the Rio Grande, subalpine, 

 Brandegee. 

 P. Neo-Mexicana, Thurber. A span to 2 feet high, erect and strict, very leafy, viscid- 

 pubescent, sometimes also hirsute : leaves interruptedly twice pinnately parted into small 

 and short lobes : corolla comparatively small, 2 or 3 lines long, bluish or purplish, the short 

 lobes from minutely crenulate to erose-denticulate : stamens and style often no longer than 

 the corolla-lobes, sometimes rather conspicuously exserted. — Torr. Bot. Mex. Bound. 143. 

 P. glandulosa, var. Neo-Mexicana, Gray, p. 160. — Common on the plains, from N. Colorado 

 to New Mexico. A peculiar state of a short-stamened form, with much less dissected 

 leaves and almost oblong capsule, coll. in central part of Colorado by Brandegee, needs 

 further inquiry. 



