162 HYDROPHYLLACE^:. Phacelia. 



acute, coarsely and irregularly incised or pinnatifid ; the lower short-petiolulate and the 

 uppermost confluent : racemes loose, 7-20-flowered : pedicels spreading or in fruit recurved : 

 calyx-lobes linear, loose, longer than the globular capsule : corolla rotate-campanulate, 

 violet-blue, over half an inch in diameter, with rather short rounded lobes and very con- 

 spicuous internal appendages : stamens (bearded) and style usually more or less exserted. 

 Fl. i. 134, t. 16 ; Gray, Man. ed. 5, 369. Shaded banks of streams, Ohio and Illinois to 

 Alabama : flowering in June. 



Var. brevistylis, Gray. A remarkable form, with corolla about one half smaller : 

 style and especially the stamens not exserted. P. brevistylis, Buckley, in Am. Jour. Sci. 

 xlv. (1843) 172. Alabama, Buckley, Nevius, &c. 



2. CosiiXNTHUs, Gray. Ovules and seeds of Enphacelia : corolla destitute 

 of internal appendages, almost rotate ; its lobes fimbriate : filaments (villous- 

 bearded) rarely longer than the corolla : ovary villous-hispid at the summit, 

 otherwise glabrous : low annuals, with loosely racemose flowers in the manner of 

 the last preceding species and of earliest of the next section. Man. Bot. ed. 2, 

 328, & 5, 369. Cosmanthus, Nolte. Cosmanthus Eacosmanthus, A.DC. in part. 



P. Purshii, Buckley. A span to a foot high, diffusely branched from the base, sparsely 

 hirsute : cauline leaves pinnately 5-11-parted, the upper closely sessile ; lobes oblong or 

 lanceolate, acute : racemes rather many-flowered, sometimes forking : calyx-lobes linear : 

 corolla light blue varying to white (half inch in diameter). Buckley in Am. Jour. Sci. 

 xlv. 172 ; Gray, Man. 1. c. P. fimbriata, Pursh, &c. Cosmanthns fimhriatus, Nolte, A.DC. 

 Prodr. ix. 297. Moist wooded banks, W. Pennsylvania to Minnesota and Missouri, North 

 Carolina and Alabama. Pedicels filiform, G to 10 lines long. Perhaps only a variety of 

 the next. Seeds as in the preceding. 



P. fimbriata, Michx. Weak and diffuse, a span high, less hirsute : cauline 3-7-clef t or 

 lobed or the lower lyrately divided ; the lobes obtuse or roundish : racemes few-flowered : 

 pedicels filiform : calyx-lobes linear-oblong or spatulate : corolla white (only 3 or 4 lines 

 broad), rather shorter than the stamens. Fl. i. 134; Gray, Man. 1. c. In woods of the 

 higher Alleghany Mountains, Virginia to Alabama ; flowering early. 



Var.? Boykini, Gray. More robust, evidently growing in more exposed soil : 

 racemes rather many-flowered, at length strict, with fruiting pedicels erect and not longer 

 than the calyx : corolla far less fimbriate, bluish. Proc. Am. Acad. x. 320. Upper part 

 of Georgia, Boykin. Perhaps a distinct species, more likely a state of P. fimbriata, growing 

 in a lower and warmer region. 



3. COSMANTHOI'DES, Gray. Ovules and seeds 3 to 8 (rarely only a pair) on 

 each placenta, the latter with reticulated testa : appendages of the rotately or 

 open-campanulate corolla wanting, or very inconspicuous and remote from the 

 stamens : capsule globular and pointless : low annuals of the Atlantic United 

 States, early-flowering, hirsute-pubescent or glabrate, with mostly pinnatifid leaves, 

 the upper closely sessile, simply racemose flowers, and somewhat villous-bearded 

 filaments about the length of the blue or white corolla. 



* Ovules 2 to 4 on each (at length deciduous) placenta: globose capsule thin-walled: slender and 

 smoothish little annuals, with the aspect of Cusm'tnthtis, but lobes of the corolla entire, its base 

 with no appendages or only obscure vestiges. Proc. Am. Acad. x. 320. 



P. glabra, Nutt. Slender, 3 to 8 inches high, glabrous except a few hirsute short hairs 

 chiefly on the margins of the leaves and calyx: corolla 3 or 4 lines in diameter : calyx- 

 lobes in fruit little longer than the capsule, mostly oblong or oval : otherwise as in P. par- 

 viflora. Trans. Amer. Phil. Soc. n. ser. v. 192 ; Gray, 1. c. Low prairies, Arkansas and 

 Eastern Texas. Very like slender and smoother forms of the next, into which it probably 

 passes. Ovules 4 in some flowers, 5 to 7 or 8 in others. 



P. parviflora, Pursh. A span or more high, sparsely hirsute or glabrate, branched 

 from the base : radical and lowest cauline leaves lyrately pinnate, with 3 to 5 roundish 

 leaflets or divisions, or sometimes simple and entire ; the upper mostly sessile and 3-9- 

 parted or cleft into oblong or linear-lanceolate lobes : racemes loose, several-many-flowered ; 



