564 ORDER 91. HYDROPHYLLACE^E. 



FIG. GTS. Hydrophyllum Virginfcnm, 

 flower: n, corolla cut open, showing the 

 honey -srroovos ; b, ovary and style ; c, 

 section of seed. GENERA. 



Placenta? central, large, many-seeded. Cymes not scorpoid HTDROLBA. 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 (quinciu>cial) in the bud. (d) 



C Stamens cxsertcd. Flowers in forked, scorpoid racemes HTDROPIIVLLUM. 1 



C Stamens included. Flowers- solitary, opposite tho leaves NEMOPHILA. 55 



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



d Flowers- racemed. Lobes of the corolla entire (seeds 4.) I'IIACELTA. 4 



Lobes of the corolla entire (seeds oo) KUTOCA. 5 



Lobes of the corolla fringed COS.M ANTIIHS. 6 



1. HYDROPHYL/LUM, Tourn. WATER-LEAF BURR-FLOWER. (Gr. 

 tSrfwp, water, 0vAAov, leaf; the leaves in spring arc said to hold water.) 

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

 olla campanulate, convolute in bfed, with 5 longitudinal, margined nec- 

 tariferous grooves inside ; stamens exserted ; capsule globon?, 1-celled, 

 2-valved, 4-secdcd y 3 of the seeds mostly abortive ; placenta? 'J, fleshy, 

 free except at the base and apex. 2 Radical Ivs. on long petioles, 

 pinnatcly or palmately veined, cauline alternate. Cymes scorpoid, 

 bractless. 



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



Calyx not appendaged. Filaments much exserted Nos. 2 4 



1 H. appendiculatum MX. Lvs. subpalmately 5-lobed, the lower almost pin- 

 natifid, the lobes dentate, diverging, arid with the 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. Sts. 12 to 18' high, branched. 

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

 and diverging in a stellate manner. Cal. 4 to 5'' long, appendages defiexed, 1" 

 long. Cor. blue. May. 



2 H. Virginicum L. Plant nearly smooth ; Ivs. pinnatijid and pinnate, the seg- 

 ments oval-lanceolate, incisely serrate : 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 tho length of the bell-shaped corollas. Leaves lew, 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 thallow lobes, 

 unequally dentate, teeth obtuse-mucroriate ; fls. 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 the 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; Ivs. 

 oblong-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-flowered ; cor. glabrous except the grooves inside. 



