HEXANDRIA. MONOGYNIA. 227 



mary radical conspicuous, conic. Somorhize f roundish, 

 larpfe, dark green, umbilically depressed at the summit, 

 having a small concealed internal cavity, and a lateral 

 shallow groove for the reception of the gemmula which 

 is appressed to it and curved over the greater part of the 

 somorhize. 



Of this genus there is a second species in Japan. 



334. ACORUS. L. (Calamus, Sweet-Flag.) 



Spadix cylindric, covered with florets. Co- 

 rolla 6-petalled, naked. Style none; stigma a 

 mere prominent point. Capsule 3-celled, S- 

 seedcil? 



Spadix coming out laterally upon the middle of the 

 leaf, which is produced beyond it in the form of a sword 

 blade. Leaves ensiform. Rout aromatic. 



Species. 1. A Calamus. Common and indigenous. 

 Stamina varying from 6, to 5 and 4, on the same spadix. 

 Flowers tessellately aggregated, greenish. 



Common to Europe and North America, there is also a 

 second species in China. 



i35. JUNCUS. L, (Rush.) 



Caliv inferior, 6-parted, equal, persistent. 

 Corolla none. Stigmata 3. Capsule 1 -celled, 

 3-valved. Seeds numerous. 



Stem simple, gramineous, without nodes, and leafless, 

 or nodose with the leaves sheatliing the nodes, fiowers 

 terminal or lateral, corymbose or paniculate, branchlets 

 sheatlied at the base- 



Species. 1. J. acutus. 2- crj7iglQmeratns. 3 ejffusus. 

 At- filiformis. 5. bicomis. 6. setaceus. 7- marginatna. 8. 

 nodosiis. 9. polycephatus. 10. Sfjlvaiicus. 1\. verticilkitus. 

 12. acuminatus. 13. aristaiiis- 14 bulbosus. 15. temiis. 

 16. buforiius. 17 ■ campestns. 1^. melano carpus. 19. ripens. 



Chiefly an European and North American genus, with 

 the exception, iiovvever, of a few species in Barbary, 

 South America, and tlie Cape of Good Hope. 



j 1 1 this cabe a large round, ingerminative body laterally 

 conntrcted by a vascular system to the gemmule and forming 

 the principal part of the seed. 



