436 XCV. HYDROPHYLLACEiE. Hydrophyllum. 



cohering witliout a common receptacle, at length separable. — Herbs 



or shrubs. Spikes unilateral. Floieers never yellow. 



1. H. Europium. Heliotrope. — Herbaceous; Zi-5. ovate, entire, rugose and 

 tomentose; spikes 'Wi 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-planls. Stem 8 — 12Miigh. Leaves 1 — 

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

 2. H. Peruvianum. Peruvian Heliotrope. — Shrubby; Its. ovate-lanceolate; 

 Jls. 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 stnaU tree.'!, often hispid. Lvs. alternate, or the lower opposite, often lobed. 

 Fis. in circinate racemes or luulatcral siiikes, rarely axillary and solitary. 

 Cal. 5-cleft. Uie sinuses usually with retlexed appendages, persistent- 

 Car. 5-lol)ed, regular, with 10 melliferous scales near the base. 

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



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



Ot-a. free, simple, 1-celled. Sry/e single, terminal, bifid. Stigmas 2. P^acewra 2, parietal or on stjiiks 

 FY.— Capsule invested with the permanent calyx. 



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

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



Conspectus of tke Genera. 



< Placenta large, fleshy, free. . . Hydrophyllum.! 



i appendag'd inside with ^ Sta. exserted. \ Placenta' on the middle of the A-ulves. PJiacelia. 4 



< 5 mellilerous grooves. I Stamens included. Sepals very large. . . . Ellism. 2 



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



1. HYDROPHYLLUM. Tourn. 



Gr. v6(x)p, water, and tpvWov, 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 gloLose, 2-celled, 2-valved, 4-seeded, 3 of the seeds mostly 

 abortive ; placenta fleshy, free. — North American herbs. Radical lvs. 

 on long petioles.) pinnately &)' palmately veined,^ cauline alternate. Cymes 

 scorpoid.) bractless. 

 * Catyx appendoged bettceen 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 ba.sc ovate, acute, 4 times shorter ; cor. glabrous except 

 the minute appendages inside; sla. included. — (g) Mich, to la., Pliunmerl and 

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

 1 — 4' long. Tlie 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 twt appendaged. Filaments nnich e.vscrtcd. 



2. H. ViRGiNicuM. Virginian Water-leaf. * 

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

 lanceolate, incisely servaie; fascicles conglomerate; ped. as long as the jieti- 

 oles. — 1\. An inhabitant of wet or moist woods, Can. to Car. and Western 

 States. Stem a toot high, bearing large, roundish lulls of flowers peculiarly 

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

 of the bell-shaped corollas. Leaves i'ew, on long, cla.sping 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. Canadexse. Canadian Wc'fe?--teaf. Bwr-flourr. 



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



