CRASS ULACEAE (ORPINE FAMILY) 441 



in peat-bogs and moist sandy ground, Lab. to Alaska, s. to Pa., the Great Lake 

 region, .Minn., and in the mts. to Ala., Mont., and Cal. June- Aug. (Eurasia.) 

 Var. com5sa Fernald. Dwarf ; inflorescence 1-few-flowered, usually capi- 

 tate ; calyx crimson or roseate; petals greenish or crimson, sometimes folia- 

 ceous ; carpels, and sometimes other parts of the flower, modified to green 

 gland-hearing leaves. —Marly bogs, Gaspe Co., Que. ; and Herkimer and Oneida 

 Cos., N. Y. (Haberer). 



2. D. anglica Huds. Leaves erect, linear- to ohovate-spatulate. loith smooth or 

 sparsely hairy petioles, the blade 1.5-5 cm. long, 3-7 mm. broad ; scapes 0.6-3 

 dm. high, l-S-flowered ; corolla white ; seeds blackish, loosely faveolate. {D. 

 longifolia L., in part.) — Marly bogs, Nfd. and e. Que. to B. C, s. to Mich., 

 Ida., and n. Cal. June-Aug. (Eurasia, Sandwich I.) 



3. D. longifolia L. Leaves spatulate, tapering into the long rather erect 

 naked petioles ; scape 0.2-2 dm. high, 1-20-flowered ; flowers white ; seeds red- 

 dish brown, loith a close papillose coat. {D. intermedia Hayne.) — Bogs and 

 sandy shores, Nfd. to Ela. and La. ; and locally inland to the Great L. region. 

 June-Aug. (W. L, Eu.) 



4. D. linearis Goldie. Leaves linear, obtuse, the blade 1-6 cm. long, 1.5-3 

 mm. wide, on naked erect petioles about the same length ; scape 2-10 cm. long, 

 1-8-flowered ; flowers white or pinkish ; seeds black, icith a smoothish close coat. 

 — Marly bogs and springy places, e. Que. to Alberta, locally s. to n. Me., Mich., 

 Wise, and Minn. June. July. 



5. D. brevifblia Pursh. Leaves spreading, very delicate, cuneate-ob ovate, 

 0.5-1.5 cm. long (including the smooth dilated petioles) ; stipules nearly obsolete ; 

 scape filiform, glandular, 1-10 cm. high, 1-7 -flowered ; the white corolla 1-1.5 

 cm. broad. — Wet banks and ditches, A^a. to Ela. and Tex. Apr., May. 



6. D. filif6rmis Raf. Leaves very long (1-3 dm.) and filiform, erect, glan- 

 dular throughout ; floicers numerous, purplish (0.7-1.5 cm. broad'); seeds spindle- 

 shaped. — Wet sand, near the coast. Cape Cod, Mass., to Del. June-Sept. 



PODOSTEMACEAE (River Weed Family) 



Aquatics, growing on stones in running icater, some with the aspect of Sea- 

 weeds, or others of Mosses or Liverworts ; the minute naked flovjers bursting from 

 a spathe-like involucre as in Liverworts, producing a 2-3-celled many-seeded 

 ribbed capsule. — Represented in North America by 



1. PODOSTEMUM Michx. River Weed 



Flowers solitary, nearly sessile in a tubular sac-like involucre, destitute of 

 floral envelopes. Stamens 2. borne on one side of the stalk of the ovary, with 

 their long filaments united into one for more than half their length, and 2 short 

 sterile filaments, one on each side ; anthers 2-celled. Stigmas 2, awl-shaped. 

 Capsule pedicellate, oval, 8-ribbed, 2-celled, 2-valved. Seeds minute, very 

 numerous, on a thick persistent central placenta, destitute of albumen. — Leaves 

 2-ranked. (Name from Troi^s, foot, and (TT-qfxwv, stamen ; the two stamens being 

 apparently raised on a stalk by the side of the ovary.) 



1. P. ceratophyllum Michx. Leaves rigid or horny, dilated into a sheathing 

 base, above mostly forked into thread-like or linear lobes. — On rocks in streams, 

 N. B. to Ont., Minn., and southw., local. July-Sept. — A small olive-green 

 plant, of firm texture, resembling a Seaweed, tenaciously attached to loose stones 

 by fleshy disks or processes in place of roots. 



CRASSULAcEAE (Orpine Family) 



Herbs, succulent (except in 1 genus), with perfectly symmetrical flowers; 

 viz., the petals and pistils equaling the sepals or calyx-lobes in number (3-20), 

 and the stamens the same or double their number, — technically different from 



