HYDROPHYLLACEAE. 765 



into 3-7, dentate or incised segments, or these again pinnatifid ; flowers blue or 

 violet, 12-16 mm. broad, in loose racemes, the inflorescence only slightly scorpioid; 

 pedicels 8-20 mm. long, recurved in fruit; calyx-segments linear; appendages of 

 the rotate-campanulate corolla in pairs between the stamens; filaments pilose, 

 exserted. Moist thickets and along streams, Ohio to Mo., south to Ala. April-June. 



4. Phacelia Franklinii (R. Br.) A. Gray. Franklin's Phacelia. (I. F. 

 f. 3005.) Annual, villous pubescent; stem 1.5-4.5 dm. high. Leaves 3-8 cm. 

 long, pinnately parted into 7— 15 linear or linear-oblong acute segments; flowers 

 blue or nearly white, in scorpioid racemes; calyx-segments linear-lanceolate, 

 acute, longer than the tube of the rotate-campanulate corolla; appendages of the 

 corolla free at the apex; filaments glabrous, or nearly so; styles united nearly to 

 the summit. Ont. and Minn, to Br. Col., Wyo. and Idaho. Summer. 



5. Phacelia dubia (L.) Small. Small-flowered Phacelia. (I. F. f. 

 3006.) Annual, puberulent or glabrate, 1-3 dm. high. Lower and basal leaves 

 petioled, 2-5 cm. long, pinnatifid or pinnately divided into 3-5 obtuse segments 

 or rarely merely dentate, or even entire; flowers light blue or white, racemose; 

 racemes 5-15-flowered; corolla rotate-campanulate; anthers slightly exserted; 

 capsule 6-12-seeded; fruiting pedicels ascending. In moist soil. Perm, to Ga., 

 Kans. and Tex. April-June. [P. parvi flora Pursh.] 



6. Phacelia hirsuta Nutt. Hairy Phacelia. (I. F. f. 3007.) Similar to 

 the preceding but usually stouter, hirsute-pubescent. Leaves pinnatifid into 5-9 

 usually entire segments, or the upper 3-5-lobed, or entire, sessile; racemes rather 

 dense; flowers blue; calyx- segments hirsute; corolla rotate-campanulate; ovules 

 3 or 4 on each placenta; stamens scarcely exserted; capsule 4-8-seeded. In dry 

 soil, Va. to Ga., Kans. and Tex. April-June. 



7. Phacelia Covillei S. Wats. Coville's Phacelia . (I. F. f. 3008.) 

 Similar to the two preceding species, pubescent; branches weak, 1.5-3 dm. long. 

 Leaf-segments 3-7, obtuse; racemes 1-5-flowered; pedicels filiform, 1-3.5 cm# 

 long; calyx-segments linear; corolla tubular-campanulate, about 6 mm. long and 

 broad; anthers not exserted; capsule 3-4 mm. in diameter; fruiting pedicels 

 recurved. Along the Potomac River above Washington, and in 111. April-May. 



8. Phacelia Purshii Buckl. Pursh's Phacelia. (I. F. f. 3009.) Annual, 

 pubescent; stem 1.5-4.5 dm. high. Lower and basal leaves pinnately parted or 

 pinnatifid into 9-15 oblong or lanceolate segments; upper leaves sessile, with fewer 

 segments; racemes strongly I- sided, io-zo-flowered; pedicels 6-25 mm. long; calyx- 

 segments lanceolate or linear-lanceolate; corolla 10-12 mm. broad, blue or white; 

 filaments slightly exceeding the corolla; ovules 2 on each placenta. In moist woods 

 or thickets, Penn. to Minn., N. Car., Ala. and Mo. April-June. 



9. Phacelia fimbriata Michx. Fringed or Mountain Phacelia. (I. F. f. 

 3010.) Annual, sparingly pubescent; stems 1. 5-5 dm. long. Basal and lower 

 leaves slender-petioled, pinnately divided into 5-9 obtuse segments; upper leaves 

 sessile, their segments acute; clusters loose, 3-12-flowered; pedicels 8-30 mm. 

 long; flowers 8-10 mm. broad, white; calyx- segments linear to spatulate, obtuse; 

 corolla rotate-campanulate; filaments pilose about equalling the corolla; ovules 2 

 on each placenta. In woods, mountains of Va, to Ala, May-June. 



5. NAMA L. [HYDROLEA L] 

 Perennial herbs, with alternate entire leaves, sometimes with spines in their 

 axils, and blue clustered flowers. Calyx-segments distinct to the base. Corolla 

 rotate-campanulate, 5-cleft, the lobes imbricated in the bud. Stamens inserted on 

 the base of the corolla; anthers sagittate. Ovary 2-celled (rarely 3-celled); ovules 

 numerous on fleshy adherent placentae; styles 2, rarely 3, distinct to the base; 

 stigma capitellate. Capsule globose or ovoid, septicidally or irregularly dehiscent. 

 [Greek, a stream, referring to the habitat.] About 15 species, natives of warm 

 and tropical regions. Besides the following, another occurs in the southern U. S. 



Leaves lanceolate; flowers mostly in axillary clusters. 



Glabrous, or very nearly so, throughout ; sepals ovate Jo ovate-lanceolate. 



1. N. affinis. 



Villous, at least above, and on the calyx; sepals lanceo' late. 2. N. ,/uadrhalvis. 



Leaves ovate; flowers mostly in terminal clusters ; sepals \ illous. 3. - v - <'■ 



