HYDROLEACEAE 



971 



dm. long: leaves numerous; blades pinnately divided; segments 3-5: pedicels 0.5-1.5 

 cm. long : calyx campanulate ; lobes lanceolate or ovate-lanceolate, 1-1.5 mm. long, 

 acute, accompanied by minute appendages : corolla white or bluish, less than 3 mm. broad ; 

 lobes rounded, as long as the tube : capsules subglobose, 4-5 mm. in diameter : seeds sub- 

 globose, pitted in lines. [Ellisia microcalyx Nutt.] 



On shaded banks, Virginia to Arkansas, Florida and Texas. Spring. 



2. Nemophila phacelioides Nutt. Foliage hirsute, or glabrate in age. Stems 

 branched at the base, the branches 0.5-6 dm. long, often simple : leaves 5-10 cm. long ; 

 blades pinnately divided; segments usually incised, the upper ones confluent; petioles 

 shorter than the blades : pedicels slender, 4-12 cm. long : calyx bristly ; lobes lanceolate, 

 8-9 mm. long, acute, ciliate, accompanied by ovate or oblong-lanceolate appendages, 4-5 

 mm. long: corolla 2-2.5 mm. broad; lobes obovate to cuneate, retuse or notched at the 

 apex : capsules globular, 5-6 mm. broad : seeds impressed-punctate. 



On prairies, Arkansas and Texas. Spring. 



3. MACRO CALYX Trew. 



Annual caulescent herbs, with pubescent foliage. Leaves alternate, or opposite : 

 blades pinnately divided or 1-3-pinnatifid. Flowers solitary in the axils, or sometimes in 

 racemes. Calyx accrescent : lobes 5, spreading, not accompanied by appendages at the 

 sinuses. Corolla shorter than the calyx or slightly surpassing it : tube campanulate to 

 cylindric, usually with 5 minute appendages within : lobes 5, convolute. Stamens 5, in- 

 cluded. Ovary 1-celled. Styles 2-cleft. Ovules 2-4 in each fleshy placenta which is at- 

 tached to the top and bottom of the cavity. [Ettisia L. ] 



1. Macrocalyx Nyctfelea (L. ) Kuntze. Foliage sparingly hirsute or glabrate. 

 Sterns erect, 0.5-3 dm. tall, at length radially or diffusely branched : leaves 5-10 cm. long ; 

 blades pinnatifid, longer than the petioles ; segments spreading, entire, toothed or incised : 

 pedicels very slender, spreading, or nodding, 1-2 cm. long : calyx-lobes triangular-lanceo- 

 late, becoming 7-8 mm. long, acute, more or less pubescent like the rest of the inflores- 

 cence : corolla bluish or white, 7-8 mm. broad : capsules subglobose, pubescent, 5-6 mm. in 

 diameter : seeds usually pitted. [Ellisia Nyctelea L. ] 



In moist or shaded places, New Jersey to Minnesota, North Carolina, Missouri and Kansas. 

 Spring and summer. 



4. PHACELIA Juss. 



Annual or perennial caulescent herbs, with usually pubescent or puberulent foliage. 

 Leaves alternate or opposite below : blades various. Flowers in scorpioid racemes or cymes. 

 Calyx slightly accrescent : lobes 5, not accompanied by appendages. Corolla white, blue, 

 violet or purple, of various shapes : tube often appendaged within : lobes 5, imbricated, 

 spreading. Stamens 5 : filaments adnate to the base of the corolla-tube. Ovary 1-celled, 

 with 2 narrow placentae attached to the walls of the cavity. Style 2-cleft. Ovules 

 2-several on each placenta. Capsules 1-celled or falsely almost 2-celled by the dilation 

 of the placentae, 2-valved. Seeds reticulated or roughened. 



Corolla with entire lobes, or these merely crenulate. 



Appendages of the corolla-tube between the stamens conspicuous. 

 Stamens longer than the corolla. 

 Leaf-blades 2-divided or parted. 

 Leaf-blades 1-divided or parted. 



Pedicel much shorter than the calyx at maturity : 



broad, glabrous. 

 Pedicel as long as the calyx or longer at maturity 



long and narrow, villous on the edge. 

 Stamens shorter than the corolla. 

 Appendages of the corolla-tube inconspicuous or obsolete. 



Ovules, and sometimes seeds 2-4 on each placenta: corolla-lobes entire. 

 Foliage glabrous, or if pubescent, hairs only on the margins of the leaves 



and calyx-lobes. 

 Foliage more or less copiously pubescent. 



Puberulent : corolla white or pink, 8-10 mm. broad. 

 Hirsute : corolla violet-purple, 12-15 mm. broad. 



Ovules, and sometimes seeds about 8 on each placenta : corolla-lobes crenulate. 

 Pedicels longer than the calyx-lobes. 



Calyx-lobes very unequal, the broader suborbicular : corolla 1 cm. 



broad. 



Calyx-lobes nearly equal, broader, oblong : corolla 2 cm. broad. 

 Pedicels shorter than the calyx-lobes. 

 Corolla with fimbriate laciniate or fimbriate-dentate lobes. 



a. Pedicels as long as the calyx-lobes or a little longer at maturity. 



corolla-appendages 

 corolla-appendages 



1. P. dissecta. 



2. P. congesta. 



3. P. bipinnatifida. 



4. P. brevistylis. 



5. P. glabra. 



6. P. dubia, 



7. P. hirsuta. 



8. P.laxa. 



9. P. patuliflora. 

 10. P. stridiflora. 



