HYDROPHYLLACEiE. 417 



P. Ixodes, Kellogg. Viscid aud villous, heavy-scented, tall and stout: leaves pinnately 

 parted or below divided, aud the coarse divisions sinuate-pinuatilid or merely incised: spikes 

 dense: flowers considerably larger tiiau in the foref^oiug: corolla open-canipanulate, 4 or 5 

 lines in length and breadth of limb, bluish ; its aj)]jendages semi-orbicular, wlioUy adnate, 

 ol)Ii(iue, aud united with the base of the filament : stamens and style not exsertcd : sepals in 

 fruit 5 lines long, spatulate, a little longer than the oblong many-seeded capsule : seeds 

 oblong, angulate, scrobiculate. — Bull. Calif. Acad. i. 6; Gray, Proc. Am. Acad. I.e. — Ex- 

 tra-liniital, first collected on Ccdros Island, Lower California, but now found so uear the 

 boundary as All Saints' Eay, Orcitit. 



P. brachyloba, Okay, p. 167. Ovules often as many as 20 in each cell: appendages of 

 the c<irolla sometimes obsolete. 



P. circinatiformis, Guay, p. 167. This has been collected on Mount Hamilton, Santa 

 Clara Co., but is still very little known. 



P. Parishii, Gray. Very like P. pn/rhclla, p, 168, in foliage and habit : peduncles fully as 

 long as the fruiting spike, the primary ones scape-like : flowers almost sessile, crowded : 

 corolla (2 lines long) blue or bluish, hardly at all surpassing the calyx, the appendages ob- 

 scure or none : fructiferous sepals broadly spatulate, equalling the oblong about 20-seeded 

 cajisule : seeds over half-line in length (twice the size of those of P. jiidrhel/a), narrowly 

 oblong, scrobiculate. — I'roc. Am. Acad. xix. 88. — S. E. California, near Rabbit Springs, 

 on the borders of the Mohave Desert, May, 1882, Parish. 



P. Lemmoni. Near to P. puU-hcJIa and the preceding, more leafy aud taller : leaves thin- 

 ner and rounder, coarsely angulate-dentate or crcnate, lower ones subcordate : spikes short- 

 peduncled, in fruit rather loose and with short pedicels erect: corolla white (2 or 3 lines 

 long), hardly twice the length of the calyx, the appendages semi-oblong; fructiferous sepals 

 spatulate, viscidulous, hardly puberulent, a little longer than the ovoid about 30-seedcd cap- 

 sule : seeds short-oval, a third of a line long, minutely scrobiculate. — N. W. Arizona, on 

 plains, at Mineral Park, 1884, Lemmon, coll. no. 3350. 



P. saxicola, Gray. Near P. pusiUa, p. 1G9, more hirsutely pubescent, a span or less high, 

 diffusely branched from the annual root : leaves narrowly spatulate, the base narrowed into 

 a slender petiole, entire : flowers few and s})arsely racemose, short-pedicelled ; sepals spatu- 

 late-linear, 2 to 4 Hues long, either moderately or very much surpassing the oblong-campanu- 

 late blue corolla; internal appendages very narrow: capsule small, oval-oblong: seeds 

 globular, smoothish. — Proc. Am. Acad. xx. 304. — N. W. Arizona, at Kingsman's Station, 

 April, 1884, Lemmon, on rocks, which the insinuating roots cleave off in thin scales. 



P. glechomaefolia. Next to P. rotundlfoUa, p. 169, larger, merely viscidulous-puberulent 

 (no hirsute pubescence): stem a foot or less high, paniculately much branched : leaves 

 slender-petioled, all but the uppermost cordate-orbicular, coarsely crenate, an inch wide: 

 flowers loosely racemose, on slender and mostly filiform pedicels of half to a quarter inch in 

 length, spreading in anthesis and mostly so in fruit : corolla funnelform, 4 or 5 lines long, 

 lilac-purple, twice or thrice the length of the calyx ; internal appendages narrow : fructiferous 

 sepals spatulate, a little longer than the oval and obtuse many-seeded capsule : seeds globose- 

 oval, deeply scr(ii)iculate, hardly a quarter of a line long. — Between Peach Springs and the 

 Grand Canon of the Colorado, May, 1885, A. Gray. 



§ 7. MlCROG^NETES, p. 109. 



P. Ivesiana, Torr. Extends northward in the dry region to the interior of Oregon and 

 Washington Terr., Suksdorf, Howell. — Near this and P. Fremontii come the following : — 



P. Orcuttiana, Gray. Viscid, puberulent, about a foot high : leaves pinnatifid, somewhat 

 lyrate, the lobes short-oblong and entire : flowers sessile in the at length elongated dense 

 spikes: corolla rotate-campanulate, doulile the length of the cr.lyx, with limb 3 or 4 lines 

 broad, white with yellow eye, nearly or quite destitute of internal appendages : capsule oval, 

 nearly equalling the narrowly spatulate (liarely 2 lines long) sepals, 12-I4-seeded : seeds 

 oval, obscurely favose-reticulated between the tran.sverse corrugations. — Proc. Am. Acad, 

 xix. 88. — Mountains of Lower California not far below the U. S. boundary, Orrutt. 



P. aSinis. Between the foregoing and P. Fremontii, viscid and puberulent, less than a foot 

 high : leaves pinnately parted mostly into linear-oblong entire or incisely toothed lobes : 



27 



