WATERLEAF FAMILY 7u3 



Terminal divisions of the leaves large and obo\ate in out line. 



15. P. splcndrns. 

 Terminal divisions of the leaves not much enlarged, ovate, lanctK)I:ite or oblong 

 in outline. 16. P. olandulosa. 



Corolla-lobes distinctly dentate or erose. 



Corolla ^vliite; stamens about twice as long as the corolla. 17. P. alba. 

 Corolla purplish or pink. 



Stamens slightly exceeding the corolla: corolla-lobes erose. 18. P. neomr Tirana. 

 Stamens "included; corolla-lobes dentate. 19, P. dctiticulala, 



III. RA^rosT=;s^\I.vE. 



Leaves pinnatiftd or bipinnatifid. 



Calyx-lobes oblanccolate; segments of the lea\es broad, obovate or oblong; plant 



diffusely branched. 20. P. ramoH$8ima. 



Calyx-lobes linear; segments of the leaves small, oblong: plant stmple. 



21. /^ hispida. 



Leaves round-lobed and coarsely crenate. 22. P. Rattani. 



IV. LlXE.U^ES. 



Leaves pinnately divided with numerous divisions, wliich are often toothed. 



23. P. Franklinii, 



Leaves entire or with 3-5 entire divisions. 24. P. linearis. 



V. Sericeae. 



Stamens only slightly exceeding the corolla. 25. P. idahoensis. 



Stamens at least twice as long as the corolla. 



Leaves divided half ways to the midrib; stamens twice as long as the corolla. 



26. P. Lyallii. 



Leaves divided to near the midrib; stamens about three times as long as the corolla. 

 Plant equally sericeous throughout; segments of the leaves narrowly linear. 



27. P. scricea. 



Plant finely pubescent, hirsute-ciliate on the petioles; segments of the leaves 

 oblong. 28. P. ciliosa. 



VI, Puix:hellae. 



Flowers almost sessile in small dense sessile spikes; calyx equalling the corolla, or slightly 



shorter. . * . ^ , .. i . 



Leaves pinnatifid; calyx enlarging m frmt and strongly reticulate. 



^ 29. P. nrmomargtnata. 



Leaves merely toothed or lobed; calyx neither much accrescent nor reticulate. 



Leaf-blades spatulate. o« r, .. i * 



Calvx-lobes subequal. 30. P. cephalotes. 



Calyx-lobes unequal, the longer twice as long as the shorter. 



31. P. minuttssima. 



Leaf-blades orbicular or rounded ovate. 32. P. Knighiii, 



Flowers pediceled in peduncled racemes; calyx much shorter than the corolla. 



Leaf-blades entire or nearly so. oo o ^ • 



Leaf-blades orbicular or subreniform. 33. P. demissa. 

 Leaf-blades ovate, obovate, oval, or oblong. 



Corolla about 1 cm. long; plant diffuse. 34. P. pulcnctia. 



Corolla about 6 mm. long; plant erect. o r> • 



Filaments sparsely pilose. 35. P. curvxpes. 



Filaments glabrous. 36. P. tncana. 



Leaf-blades round, sinuately toothed or crenate. ot d ; », fu 



Corolla 8-10 mm. long; leaves glandular-puberulent. 37. P. glechoma^foha. 



Corolla 3-5 mm. long; leaves hirsutulous. 38. P. rotundt folia. 



VII. BICOLORES. 



Corolla white or pale purple, not much, if at all, excee<ling the calyx. 

 Plant not glandular or scarcely so; leaves pinuatxfid. „^ „ 



CoroUa shorter than the calj-x, 39. P. aimpcstris. 



Corolla usually sUghtly exceeding the cal>-x. . ^ 40. P. Ivesiana. 



Plant decidedly glandular; leaves more or less bipinnatifid. 



CaU-x-lobes hnear or nearly so, twice as long as the capsule. 



•*" 41. P. glandulifera. 



Calyx-lobes spatulate, scarcely half longer than the capsule. 



^ 42. P. affinis. 



CoroUaabout twice as long as the calj-x; throat yeUow; limb purple. 



Corolla broadly funnelform; leaves once pinnate. 43. P. Fremontit, 



Corolla narrowly fiumelform. nearly tubtilar; leaves twice pinnatifid. 



44. P. bicolor, 



1. P. leucophylla Torr, Stem 1-3 dm. high, densely canescent and only 

 sliehtly 'hirsute; basal leaves petioled, 5-15 cm. long, oblanccolate or elliptic; 

 cah^-iobes linear or linear-oblong, obtuse, about two-thirds as long as the corolla; 

 filaments villous-bearded. Dry hills: Neb.— Colo.— Ida.— B.C. Plain— Sub- 



vioni, Je-Au. 



