ORDER XLVn. LYTHRACE^B. 809 



1. R. Maria'na, (L.) Stem hirsute, terete, furrowed. Leaves lnnceo- 

 late, attenuate at the base, hispid, serrate, ciliate. Flowers axillary or 

 terminal. Calyx hispid. Petals large, obliquely obovate, often hispid. 

 Anthers long, liuear, opening at the summit. Style longer than the sta- 

 mens. — Purple. U- June — Sept. In moist soils. 1 — 2 feet. 



2. It. angustifo'lia, (Nutt.) Stem hirsuie, nearly terete, much 

 branched. Leaves linear or lanceolate, somewhat clustered, attenuate 

 at the base, slightly hispid, setaceously ciliate, serrulate. Flowers nu- 

 merous, smaller than the preceding. Calyx glabrous — Pale purple or 

 nearly white, y. Damp soils. 1 — 2 feet. P. lanceolata, Walt. 



3. R. Vikgin'ica, (L.) Stem square, with the angles winged, hispid, 

 branching. Leaves sessile, oval, lanceolate, acute, hispid above and on 

 the ribs beneath, sometimes 5 — 7-ribbed. Flowers numerous, axillary, 

 and terminal. Calyx hispid. Petals obovate, hispid externally. — Pur- 

 ple. U- July — Sept. In swamps. 2 — 3 feet. Leer Grass. 



4. R. stuic'ta, (Pursh.) Stem glabrous, square ; angles winged, beard- 

 ed at the nodes. Leaves sessile, ovate, lanceolate, acuminate, setace- 

 ously serrulate, often hispid above. Flowers in dichotomous corymbs. 

 Calyx glabrous. — Purple. % ■ In wet pine-barrens. Aug. — Sept. 3 

 — £ feet. 



5. R. glabel'la, (Mich.) Stem glabrous, slightly furrowed, terete, 

 Bimple. Leaves lanceolate, entire, or with few serratures at the sum- 

 mit. Flowers large. Calyx with glandular hairs. Petals large, gland- 

 ular externally before their expansion. — Purple. 2£. June — Aug. 

 Damp woods. 2 — 5 feet. Leer Grass. 



6. R. cilio'sa, (Mich.) Stem simple, quadrangular, glabrous. Leaves 

 slightly petioled, ovate, lanceolate, serrulate, ciliate, hispid above. 

 Flowers in a loose dichotomous panicle, with an involucre formed by the 

 upper pair of leaves. Calyx glabrous. Petals nearly round. — Purple. 

 11. June — Aug. Pine-barreus. 1 — 2 feet. 



7. R. serrula'ta, (Nutt.) Stem small, simple, quadrangular, glabrous. 

 Leaves small, ovate, or oval, glabrous, serrulate, and ciliate. Flowers 1 

 ■ — 3, together. Calyx glandular, hispid. — Purple. If. June — July. 

 Swamps. 6 — 10 inches. 



8. R. lu'tea, (Walt.) Stem hirsute, square, branching, hispid. Leaves 

 linear, lanceolate, sometimes cuneate, entire. Flowers small. Calyx 

 smooth anil shining, or with a few scattered bristles. Petals setace- 

 ously mucronate. — Yellow. 2£. Damp pine-barrens. June — Aug. 

 12—18 inches. 



Order XLVIL— LYTHRA'CE^E. 



Calyx 4-lobed. Petals none or four. Stamens inserted 

 into the tube of the calyx, generally in number equal to the 

 lobes. Anthers short, introrse. Ovary 2 — 4-celled, inclosed in 

 the calyx ; ovules numerous ; placentae central. Capsule mem- 

 branaceous, sometimes 1 -celled. Seeds numerous, anatropous. 

 Cotyledons foliaceous. Herbs, with opposite leaves, without 

 stipules. 



ANALYSIS. 



1. Calyx with accessory teeth between the lobes 9 



Oalyx with no acoossory teeth ffj/pobrio/Ua, 1 



