300 WATERLEAF FAMILY. 



4. PHACELIA. (Greek: a cluster.) Several species cult, for orna- 

 ment. ; flowers spring or summer. 



§ 1. True Phacelia, with only 4 ovules and seeds, lobes of corolla entire. 



P. congesta, Hook. Cult, from Texas ; rather pubescent, with leaves 

 pinnately divided or cleft into few oblong or ovate cut-toothed leaflets or 

 lobes, and small blue flowers in 3 or 4 spikes at the summit of a slender 

 peduncle ; stamens slightly protruding. ® 



P. tenacetifdlia, Benth. California ; taller, bristly-hairy, with narrower 

 pinnatifid leaflets, larger flowers in longer dense spikes and long sta- 

 mens. (I) 



P. bipinnatlf ida, Michx. l°-2° high, branched, glandular-hairy, with 

 leaves twice pinnately divided into ovate cut-lobed leaflets ; flowers slender- 

 pediceled in long loose racemes ; violet-blue corolla, £' or more broad. 

 Kich soil, Ohio and 111. , S. © 



§ 2. Cosmanthus ; 4 ovules and seeds, and fringed lobes to corolla. ® (§) 

 P. Purshii, Buckley. Shady soil from Penn., W. and S., and cult, 

 under the name of the next; slender, 8'-12' high; lobes of pinnatifid 

 leaves several, lance-oblong acute ; flowers of the raceme numerous, on 

 slender pedicels ; corolla light blue or whitish, £' broad ; filaments hairy. 

 P. fimbriata, Michx. The true plant grows only in the high Alle- 

 ghanies S., is smaller, with 3-7 rounded or oblong blunt divisions to the 

 leaves, few and smaller white flowers. 



§ 3. WhitiAvia, with mostly numerous ovules ; the corolla not fringed, 

 the appendages reduced to 5 small scales. 



P. W hit lav ia, Gray (or WhitiAvia grandifl&ra) , Cult, for orna- 

 ment, from Cal.; resembles Phacelia viscida in growth and foliage, 

 but only slightly clammy, the roundish-ovate or slightly heart-shaped 

 leaves coarsely toothed, on longer petioles ; racemes loose ; corolla 1' or 

 more long, violet-blue (also a white variety); stamens and style very 

 slender and protruding. 



§ 4. CosmanthoIdes, with seeds or at least ovules 2-8 on each placenta; 

 corolla lobes entire, the appendages wanting or obscure. 



P. parvifl6ra, Pursh. Shaded banks from Penn. to N. Car. S. W.; 

 scarce, delicate little plant, 3'-6' high, with pinnately divided or cleft 

 leaves, a raceme of few flowers on slender pedicels, bluish corolla less 

 than \< wide, and few seeds. © 



§ 6. EtJTOCA, with ovules several or many, and appendages' wanting or 

 represented by vertical plaits. 



P. viscida, Torr. Cult, from California as Et/TOCA vfsciDA ; clammy 

 all over, with dark glandular hairs, rather coarse ; leaves ovate, cut- 

 toothed, short-petioled ; racemes single, terminating the branches ; 

 corolla deep blue, 1' or less wide ; pod many-seeded. (J) 



P. Menziesii, Torr. Handsome plant from Cal., cult, as Ebtoca Men- 

 ziesii and E. multifl6ra ; 3'-12', much branched, roughish or hispid ; 

 leaves generally sessile, linear or lanceolate and entire, or some of them 

 cleft ; flowers violet or white, in loose panicles. 



5. HYDROLEA. (Named from Greek word for water; the plants 

 aquatic or in wet places.) Flowers summer. 2Z 



H. Caroliniana, Michx. N. Car., S. ; has hairy stems, lanceolate 

 acute leaves tapering to the base, and lanceolate sepals nearly as long as 

 the corolla. 



H. af finis, Gray. Smooth, with short-petioled lanceolate leaves, and 

 ovate sepals as long as the corolla. S. 111., S. 



