90. ALISMACE^. 355 



long, nodding. Partial bracts tapering, bristlerpointed.-^Moun- 

 taina. P. VII. , : E. S. 



7. L. arcudta (Hook.); 1. channelled sligh'tly hairy, /Kinicfe 

 suhwiribellate of few 3 — 5-flowered clusters on Umg drooping pe- 

 duncles, segments of perianth broadly-laneeolate bristle-pointed, 

 filaments as long as the anthers, caps. roundi8h-OFate,8eeds ob- 

 long blunt or apiculate scarcely appendaged below.— -B. -B, S. 

 2688. — St. slender, 2 — 5 in. long. Xi short, cui'ved, narrowly 

 linear. Panicle of 3 — 5 small clusters, one nearly sessile, the 

 others On long deflexed stalks.^Highest summits of the Cairn- 

 gorum and Sutherland Moiintains. P. VII. ? S. 



Order XC. ALISMACE^. 



Perianth free, of 6 leaves ; 3 inner or all coloiired. Stam. 

 6 — 9 or more. Ovaries 3 — 6 or many, always distinct or ulti- 

 mately separable; cam, opening at the suture or not at all; 

 seeds 1 or ; many;.. , Embryo .straight or curved ; albumen 0. — 

 See G. F. G. MotiMsoi. ii. 



Suborder! ALISMOIDll^. 



Three inner perianth-segm. petal-like. Seeds 1—2 in each 

 cell, erect or ascending, on the suture. Embryo cylindrical, 

 doubled upon itself ; radicle next the hile. 



1. AiiSMA. Fl. perfect. Stam. 6. Carp, many, forming a 

 ring or head, small, 1-seeded, not bursting. — ^L. ovate or 

 narrow. ■ 



2. AcTiNOCAEPUS. Fl! perfect. Stam. 6. Carp. 6^-8, rather 

 large, 2-seeded, combined at the base and spreading in a 

 radiant manner. — L. cordate-oblong. , 



3. Sa&ittabia. Fl, lapncBcicius. Male fl, .with many sta- 

 mens. Female fl. with many 1-seeded compessed carpels 

 forming a head, upon a globose receptacle.rr-L. sagittate. 



Suborder n. BUTOME^. 



Three inner perianth-segm. petal-like ; three outer herbaceous 

 or slightly coloured. Seeds many, minute. Placenta ramified 

 over the inner surface of each carpel. Embryo straight or 

 curved ; radicle next the hUe. 



4. BuTOMTjs. . Perianth-segm. 6, all coloured, resembling a 

 corolla. Stam. 9. Oai-pels 6, connected below. 



Suborder m. JUNCAGINE^. 



Perianth unifoxm, herbaceous, inconspicuous, or 0. Seeds 1 — 2, 



