436 XCV. HYDROPHYLLACE^E. HYDROPHYLLUM. 



cohering without a common receptacle, at length separable. Herbs 

 or shrubs. Spikes unilateral. Flowers never yellow. 



1. H. EUROPIUM. Heliotrope. Herbaceous.; Ivs. ovate, entire, rugose and 

 tomentose; spikes in pairs. A delicate annual, native of Europe and 

 still growing on the banks of the Shenandoah at Harper's Ferry ! where Nuttall 

 saw it in 1818. Cultivated among stove-plants. Stem 8 12' high. Leaves 1 

 2' by 8 15". Flowers white, mostly in 2, terminal, long, scorpoid racemes. 

 2. H. PERUVIANUM. Peruvian Heliotrope. Shrubby ; Ivs. ovate-lanceolate ; 

 fls. in numerous, aggregated spikes. Native of Peru. A small, elegant green- 

 house shrub, 1 2f high. Leaves rough, serrulate, twice as long as wide, on 

 short petioles. Flowers small but numerous, very fragrant, white or tinged 

 with purple. 



ORDER XCV. HYDROPHYLLACE^. HYDROPHYLLS. 



Herbs, shrubs or small trees, often hispid. Lvs. alternate, or the lower opposite, often lobed. 

 Fly. in circinate racemes or unilateral spikes, rarely axillary and solitary. 

 Cal. 5-cleft, the sinuses usually with reflexed appendages, persistent- 

 Cor. 5-lobed, regular, with 10 melliferous scales near the base. 

 Sta. 5, inserted into the base of the corolla and alternate with the lobes. 



Anth. 2-celled, versatile. [from the base of the cavity. 



Ova. free, simple, l-eelled. Style single, terminal, bifid. Stigmas 2. Placenta 2, parietal or on stalks 

 Pr. Capsule invested with the permanent calyx. 



Sds. few, crustaceous. Embryo conical, in abundant, cartilaginous albumen. 

 Genera 16, species 75, chiefly American. Of no known use. 



Conspectus of the Genera. 



(Placenta large, fleshy, free. . . Hydrophyllum. 1 



( appendag'd inside with { Sta. exserted. ( Placentae on the middle of the valves. Pftacelia. 4 



< 5 melliferous grooves. { Stamens included. Sepals very large. . . . Ellisia. 2 



Corolla ( destitute of grooves or scales inside. Stamens as long as the corolla. . . Cosmanthtis. 3 



1. HYDROPHYLLUM. Tourn. 



Gr. v6(>)p, water, and (f>v\\ov, a leaf; the leaves in Spring hold each a quantity of water. 



Sepals slightly united at base ; corolla campanulate, with 5 longi- 

 tudinal, margined, nectariferous grooves inside; stamens exserted; 

 capsule globose, 2-celled, 2-valved, 4-seeded, 3 of the seeds mostly 

 abortive ; placenta fleshy, free. North American herbs. Radical Ivs. 

 on long petioles, pinnately or palmately veined^ cauline alternate. Cymes 

 scorpoid, bractless. 

 * Calyx appendaged between the sepals at base. Stamens as long as the corolla. 



1. H. APPENDICULATUM. Michx. (Ncmophila paniculata. Spreng.} 



Lvs. hairy, lower ones pinnatifid, cauline palmately 5-lobed, dentate, lobes 

 diverging, and with the long petioles, ped. and cal. hispid ; sep. lance-subulate, 

 the appendages at the base ovate, acute, 4 times shorter ; cor. glabrous except 

 the minute appendages inside; sta. included. (g) Mich, to la., Plummerl and 

 111. to Va., moist woods and bottoms. Stems 1 lf high, branched. Petioles 

 1 4' long. The leaves are of a singular form, roundish in outline, the broad, 

 acute lobes diverging in a stellate manner ; teeth mucronate. Calyx 4 5" long, 

 appendages deflexed, 1' long. Corolla blue, on long peduncles. May. 

 * * Calyx not appendaged. filaments much exserted. 



2. H. VIRGINICUM. Virginian Water-leaf. 



Plant nearly smooth; Ivs. pinnatifid and pinnate, the segments oval- 

 lanceolate, incisely serrate ; fascicles conglomerate ; ped. as long as the peti- 

 oles. ^ An inhabitant of wet or moist woods, Can. to Car. and Western 

 States. Stem a foot high, bearing large, roundish tufts of flowers peculiarly 

 distinguished by their exserted stamens and style, which are twice the length 

 of the bell-shaped corollas. Leaves few, on long, clasping petioles, with about 

 5 distinct leaflets, the upper 3 more or less confluent at base, all irregularly 

 toothed. Corollas varying from white to sky-blue. June. 



3. H. CANADENSE. Canadian Water-leaf. Burr-flower. 



Lvs. smoothish, palmate, roundish, with 5 7 shallow lobes, unequally 



