TETRANDRIA. 47 



/3. slenderer, spike filiform, nearly erect. R. fi/iformis, Roth. 

 -G. Do??, Herb. Brit. n. 178." D. Do??, M*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. FL July, Aug. O . 



Plant from 2 to 6 or 8 inches long, in a. more or less curved 

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

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

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

 Cdl. 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. jiliformis, 

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

 takes up the species in Rees's Cyclopedia, but without indicating 

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

 different from this var. /3. in any thing but in its having two-Jlowered 

 calyces. 



3. TRIGYNIA. 



32. MONTIA. 



1. M. fontana. Lighff. p. 1 10. E. B. t. 1206. 

 HAB. In rills', springy and wet places, frequent. FL June, July. Q- 

 .Whole plant succulent. Stem prostrate and rooting, 2 4 inches long. 

 Leaves small, opposite, spathulate. Peduncles nearly terminal, 

 often forked. Flowers white, at first drooping. Stam. inserted on 

 the cor., short. Germen and caps, roundish. Seeds 3, subreniform, 

 dotted. 



IV. TETRANDHIA. 



1. MONOGYNIA. 



* Perianth double (Cal. and Cor.), 

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



1. DIPSACUS. Involucre many-leaved. Cal. double, ext. very 

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

 Fruit angular, crowned with the double cat. (Flowers capi- 

 tate.) 



2. SCABROSA. Involucre many- leaved. Cal. double, variously 

 cut. Receptacle chaffy or naked. Fruit crowned with the 

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

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



ft Flowers of 1 petal, 2-seeded, superior. 



5. GALIUM. Cor. rotate, 4- cleft. Fruit a dry nut, crowned 

 with the cal. 



