564 



Order 9L— HYDROPHYLLACE^E. 



FIG. C7S. Hydrophyllum Yirginicum, ^^§W% 



flower: a, corolla cut open, showing tho <£a&1 



honev-grooves ; b, ovary and style; c, „ , 

 t^Btion of seed. GENERA.. f 



5 Placentre central, large, many-seeded. Cymes not scorpold Hydrolba. 6 



£ Placenta) parietal (at least in the middle), bearing few (1 to 4, rarely many) seeds, (b) 

 b Lobes of the corolla convolute in aestivation, (c) 

 b Lobes of the corolla imbricate (quincuntial) in the bud. (d) 



C Stamens exserted. Flowers in forked, scorpoid racemes nYDROPiiTLLUM. 1 



c Stamens included. Flowers solitary, opposite the leaves Nemopuila. a 



d Flowers solitary. Calyx much enlarged in fruit Ellisia. 3 



d Flowers racemed. — Lobes of the corolla entire (seeds 4.) Phacklia. 4 



— Lobes of the corolla entire (seeds co) Eotoca. 5 



— Lobes of the corolla fringed Cosmanthus. 6 



i. HYDROPHYLLUM, Tourn. Water-i.eaf Burr-flower. (Gr. 

 vdcLip, water, <pvXXov. loaf; the leaves in spring arc said to bold water.) 

 Sepals slightly united at base, the sinuses sometimes appendaged ; cor- 

 olla campanulatc, convolute in bud, with 5 longitudinal, margined nec- 

 tariferous grooves inside ; stamens exserted ; capsule globous, 1- celled, 

 2-valved, 4-secded, 3 of the seeds mostly abortive; placenta? 2, fleshy, 

 free except at the base and apex. — 2£ Radical lvs. on long petioles, 

 pinnately or palmately . veined, cauline alternate. Cymes scorpoid, 

 bract! ess. 



§ Calyx appendaged between the sepals at base. Stamens as long ns the corolla No. 1 



§ Calyx not appendaged. Filaments much exserted Nos.2 — i 



1 H. appendiculatuni Mx. Lvs. subpalmately 5-lobed, the lower almost pin- 

 natifid, tho lobes dentate, diverging, and with tho long petioles, ped. and cal. hir- 

 sute ; sep. lance-subulate, the appendages at the base ovate, acute, 4 times 

 shorter ; cor. glabrous except tho minute appendages inside ; stam. included. — 

 N. Y„ near Rochester, to Wis. and Va., in woods. Sis. 12 to 18' high, branched. 

 Petioles 1 to 4' long. Lvs. roundish in outline, the broad, acute lobes pointed 

 and diverging in a stellato manner. Cal. 4 to 5" long, appendages deflexed, 1" 

 long. Cor. blue. May. 



2 H. Virginicum L. Plant nearly smooth ; lvs. pinnatifid and pinnate, the seg- 

 ments oval-lanceolate, incisely serrato ; fascicles conglomerate ; ped. longer than 

 the petioles. — An inhabitant of moist woods, Can to Car. and Western States. 

 Stem a foot high, bearing large, roundish tufts of flowers, stamens and style very 

 conspicuous, twice the length of the bell-shaped corollas. Leaves few, on long, 

 clasping petioles, with about 5 distinct leaflets, tho upper 3 more or less confluent 

 at base, all irregularly toothed. Corollas varying from white to sky-blue. Jn. 



3 H. Canadense L. Lvs. smoothish, palmate, roundish, with 5 — 7 shallow lobes, 

 unequally dentate, teeth obtuse-mucronate ; lis. in crowded fascicles ; ped. shorter 

 than the forked petioles. — Quite different in aspect from the last. Found in alpine 

 woods, Can. to Car. W. to Ind. Stem 12 — 18' high, with large, roughish leaves, 

 divided into 5 — 7 lobes. Fascicles of fls. dense, terminal, but shorter than the 

 petiole which seems to continue tho stem. Cor. white or variously tinged with 

 purple, much longer than the pedicels. Jn., Jl. 



4 H. macrophyllum Nutt. Whole plant reversely hispid with white hairs; his. 

 oLlong-oval, in outline, pinnatifid, lower segments distinct, upper confluent, all incised 

 into rounded, mucronate teeth, cauline solitary or few, much smaller ; cymes ter- 

 minal, long-pedunculate, dense-flowerod ; cor. gbbrous except the grooves inside. 



