071 the Genus Juncus of Linnceus. 293 



thus described : " Calycc hcxaphyllo, staminibus totidem, quot 

 sunt calycis folia, ct seinine multo in vasculo seminali rccondito 

 a Scirpo difFert*." The species are also divided into those which 

 arc kaftj and those which are leafless. 



Scheuchzer and Ilaller have included the Gramina juncea and 

 the Gramina hivsuta in tlieir Juncoides, rejecting at the same time 

 from the former family the Eriophora and some other genera 

 which Ray had retained. The real Junci, such as acutus, glaucus, 

 effusus, &.C. rank under a separate division, with this definition : 

 " Flosculi hexapetali, rosacei, sex scilicet petalis in orbem posi- 

 tis constantes." — " Vascula seminalia triquetra aut ex triquetro 

 rotundata, trivalvja, septoque per medium cujusque valvae lon- 

 gitudinem procedente, in tria loculamenta divisa, seminibusque 

 plurimis plerumquc,ac minutissimis repleta,a/«nco/Jeautem spe- 

 cialiter difFert, scirpis teretibus, prorsus enodibusf," See. Tour- 

 nefort, whose attention was chiefly arrested by the corol, has in- 

 cluded in his character all three of these strongly-marked families, 

 because he found their petals, otherwise called the leaflets of the 

 calyx, to correspond. The penetrating Micheli, however, led 

 more by the internal structure of plants, adopted two distinct 

 genera; the first, Juncus, which he describes as having a triiocu- 

 ]ar, many-seeded capsule; the other, Juncoides, with a unilocular, 

 three-seeded capsule. The great Linnaeus, guided by Tournefort, 

 re-joined them ; and at the same time adopted in his generic cha- 

 racter the peculiarity of the Gramina hirsuta, as being unilocular; 

 — by Avhich inconsistency the real Junci are ail excluded ! Jussieu 

 does not describe the cells in his generic definition ; but at the 

 head of the natural family he calls them trilocular. 



The Gramina hirsuta seem to have been first taken up by 

 J. Bauhin under the name of Luzula. Cesalpinus calls the Jun- 



* Rait Syn. 3d ed. 431. f Scheuchzei's Jgrostographia, p. 337. 



2 Q 2 eus 



