972 HYDROLEACEAE 



Calyx-lobes oblong : corolla about 8 mm. broad ; lobes laciniate. 11. P. Soykinii. 



Calyx-lobes linear : corolla about 4 mm. broad; lobes toothed. 12. P. Bicknellii. 

 b. Pedicels fully twice as long as the calyx-lobes at maturity. 



Corolla blue or rose : stems erect. 13. P. Purshii. 



Corolla white or pinkish : stems spreading or decumbent. 14. P. fimbriata. 



1. Fhacelia dissecta (A. Gray) Small. Annual, finely hirsute. Stems 3-5 dm. 

 tall, sometimes branched above : leaves 5-10 cm. long ; blades 2-divided or parted, the 

 segments mostly acute, toothed or incised : calyx slightly bristly ; lobes linear, about 5 

 mm. long : corolla about 10 mm. broad ; lobes entire : capsules subglobose, barely ^ as 

 long as the calyx -lobes. [P. congesta var. dissecta A. Gray. ] 



On dry hills and shaded rocks, Texas. Spring. 



2. Phacelia congesta Hook. Annual, softly hirsute or cinereous. Stems 1-7 dm. 

 tall, simple or sparingly branched : leaves 5-12 cm. long ; blades pinnately divided or 

 parted, the segments blunt, 3-7 with smaller ones interposed, coarsely toothed or incised : 

 calyx bristly ; lobes linear to linear-spatulate, 3-4 mm. long, acute : corolla 6-8 mm. 

 broad ; lobes rounded, ^ as long as the tube : capsules ovoid, 3 mm. long, minutely hirsute. 



About thickets, Texas. Spring. 



3. Phacelia bipinnatifida Michx. Biennial, glandular-pubescent, or softly hirsute 

 below, often heavy scented. Stems often decumbent, 1-6 dm. long, branching, sometimes 

 diffuse : leaf-blades pinnately divided ; segments incised or pinnatifid, acute or acuminate, 

 thinnish ; petioles longer than the blades except the upper ones : pedicels longer than the 

 calyx at maturity : calyx hirsute ; lobes linear-subulate, 4-6 mm. long, acute : corolla 

 violet-blue, 1.5-2 cm. broad ; lobes rounded, longer than the tube ; appendages conspicu- 

 ous : filaments sparingly villous, exserted : style exserted : capsules ovoid-globose, 5-6 

 mm. long, apiculate, hairy. 



On damp slopes and thickets, Ohio to Illinois, Virginia, Georgia and Alabama. Spring and summer. 



4. Phacelia brevistylis Buckl. Biennial, softly hirsute below, glandular-pilose 

 above. Stems 1-4 dm. tall, branched : leaf -blades pinnately divided, the segments coarsely 

 incised or pinnatifid : pedicels longer than the calyx, at maturity : calyx bristly ; lobes 

 linear or linear-subulate, 5-6 inm. long, acute : corolla 5-8 mm. broad ; lobes rounded, 

 shorter than the tube ; appendages conspicuous : filaments delicately pubescent, included : 

 styles included : capsules depressed, 4-5 mm. long. 



In shaded slopes, North Carolina to Alabama. Spring and summer. 



5. Phacelia glabra Nutt. Annual, sparingly pubescent. Stems simple or branched at 

 the base ; branches erect or ascending, 0.5-1.5 dm. long : leaves 0.5-2.5 cm. long, the basal 

 with pinnate blades as long as the petioles or longer ; stem-leaves variable, the lower re- 

 sembling the basal, the upper sessile, pinnatifid ; segments rather obtuse : racemes few- 

 flowered : pedicels longer than the calyx at maturity : calyx sparingly bristly ; lobes ob- 

 long, 2.5-3 mm. long, obtuse : corolla 6-8 mm. broad ; lobes broadly ovate, undulate ; 

 appendages narrow : filaments exserted, glabrous : capsules subglobose, 3 mm. long. 



On prairies, Arkansas and Texas. Spring. 



6. Phacelia dubia ( L. ) Small. Annual, bright green, sparingly pubescent. Stems 

 branched at the base ; branches 0.5-4 dm. long, minutely glandular as well as appressed- 

 pubescent, often zigzag : leaves pubescent with appressed hairs and less glandular than the 

 branches ; basal leaves petioled, 1-3 cm. long, the segments varying from oval to orbicular ; 

 stem-leaves nearly sessile, 0-1.5 cm. long, with 3-5 segments, the terminal one oblong to 

 obovate, acute : flowers rather few on pedicels 0.5-1 cm. long : calyx-lobes oblong, 3-4 mm. 

 long, slightly revolute, rather obtuse : corolla 7-11 mm. long, pale lilac to greenish near 

 the center ; lobes broadly ovate, undulate, often blotched near the base : filaments pubescent, 

 lilac at the tips : capsules oblong-orbicular, 2.5-3 mm. long. [P. parviflora Pursh.] 



On banks, Pennsylvania to Kansas, Georgia and Texas. Spring. 



7. Phacelia hirsuta Nutt. Annual or biennial, hirsute. Stems simple, or branched 

 at the base; branches 0.5-3 dm. long: leaves 2-7 cm. long; primary ones spatulate or 

 oblong-spatulate ; basal and lower stem-leaves with pinnate blades and slender petioles : 

 upper leaves sessile, pinnatitid, the segments acute, often curved : racemes many-flowered, 

 2-10 cm. long : pedicels somewhat longer than the calyx at maturity : calyx bristly ; lobes 

 oblong or linear-spatulate : corolla dark-purple or purplish blue, 12-15 mm. broad ; lobes 

 rounded, undulate ; appendages narrow : filaments barely exserted : capsules rather broader 

 than high, 3.5-4 mm. long. 



In dry soil and open woods, Virginia to Missouri and middle Georgia. Spring. 



8. Phacelia laxa Small. Annual, sparingly hirsute. Stems branched at the base ; 

 branches spreading, 1-3 dm. long, simple or forked, slender : leaves 2-6 cm. long ; blades 

 pinnately lobed, the lower ones long-petioled, the upper short-petioled ; lobes entire, as- 



