TETRANDRIA. 4/ 



j6. slenderer, spike filiform, nearly erect. R. filiformis, Roth, 

 — G. Don, Herb. Brit. 7i. 178." D. Don, Al'^S. wed. 



Hab. Sea-shoreS; but not common. Arbigland in Galloway, Lightf. 

 Various parts of the Scottish coast, G. Don. — /3. Salt marshes, 

 near Abcrlady, G.Don. "F/. July, Aug. ©. 



Plant from 2 to G or 8 inches long, in a. more or less curved 

 (including the spike) and stout. In f3. nearly upright, longer and 

 more slender. Leaves linear-acuminate. Spike long. Florcin 

 distant, solitary, alternate, imbedded in a hollow of the racliis. 



- Cal. valves 2, ensiform, acute, or slightly acuminate. Cor. of 2 

 lanceolate, rather unequal, white, membranous valves. — After a 

 most careful examination of Mr. Don's specimens of R. JiUforntis, 

 I can find no difference but what I have above noted. Smith 

 takes uj) the species in Reess Ctjclopeflia, but without indicating 

 that it is of British origin. Host's R. pannouica seems to be not 

 different from this var. /3. in any thing but in its having iwo-Jlowercd 

 calyces. 



3. TRIGYNIA. 



32. MONTIA. 



1. M. fonlnna. Lightf. p. 1 10. E. B. i. 1206. 

 Hab. In rills, s])ringy and wet places, frequent. /'/. June, July. Q- 

 Whole plant succidcnt. Htem prostrate and rooting, 2 — 4 inches long. 

 Leaves small, opposite, spathulate. Peduncles nearly terminal, 

 often forked. Flov:ers white, at first drooping. Stam. inserted on 

 the cor., short. Gernien and caps, roundish. Seeds 3, subreniforni, 

 dotted. 



IV. TETRANDRIA. 



1. MONOGYNIA. 



* Perianth double {Cal. and Cor.). 

 t Flowers of 1 petal, 1 -seeded, superior. 



1. DiPSAcns. //?i'o///C7e many-ieaved. Co/, double, e.r/. very 

 minute; int. cup-shaped, entire. Receptacle chaffy, spinous. 

 F?uit angular, crowned with the double cai. (Flowers capi- 

 tate.) 



2. ScABRosA. Involucre many- leaved. Cal. doub'e, variously 

 cut. Receptacle chaffy or naked. Friiii crowned with the 

 enlarged double cal. of which the ext. is mostly membrana- 

 ceous; int. feathery or bristly. (Flowers capitate.) 



ti" Floivers of 1 petal, 2-seeded, superior. 

 5. Galium. Cor. rotate, 4-cleft. Fruil a dry ?i7itf crowned 

 with the cal. 



