CLASS XVI., XVII. 157 



ei A.SS xvi. DIADELPHIA. Stamens united by filaments in two 



sets. 



Order 5, to Order 8. Pent-octandria. From 5 to 8 stamens. 



POLYGA'LA. Calyx 5-leaved, permanent, unequal, 2 of the leafets 

 wing-like, larger, coloured, corolla irregular (or rather, calyx 3-leaf- 

 ed, corolla imperfectly papilionaceous;) capsule obcordate, 2-celled, 

 2-valved. Keel of the corolla sometimes appendaged : seeds hairv. 

 (snake root, milk-wort, low centaury, mountain flax.) 



Order 10. Decandria. Ten stamens. 

 Legume without transverse divisio?is or portions ; seeds numerous. 



(Stigma pubescent.) 



PI'SUM. Calyx with the divisions leaf-like, about equal : banner 

 protruding 2 folds : style compressed, carinate, villose above : legume 

 without down at the suture. (pea.) 



LA'THYRUS. Calyx with the two upper divisions shorter : style flat, 

 villose above, broader towards the top. (Stems mostly winged, leafets 

 2 or more, terminated by a divided tendril.) (sweet pea.) 



(Stigma not pubescent.} 



PHASE'OLUS. Keel, stamens and style spirally twisted together ; 

 legum compressed, falcate; seeds sub-compressed, reniform. {bean.) 



ROBI'NIA. Calyx small, bell-form, 4-cleft, upper division 2-parted: 

 banner large, reflexed, roundish, legume compressed, elongated, many 

 seeded ; seeds compressed, small. (locust tree.) 



TRIFO'LIUM. Flowers sub-capitate ; legume included in the calyx, 

 not opening by valves, 1 to 4-seeded. Leaves always ternate. 

 (clover.) 



LUPI'NUS. Calyx 2-lipped, anthers, 5 oblong and 5 roundish ; le- 

 gume coriaceous. (lupine.) 



CLASS xvn. SYNGENESIA. Anthers united. 



Order 1. Polygamia ^Equalis. Disk and ray florets perfect,, 



A. Floret ligulatc. 



LEON'TODON. Calyx imbricate, with flexible leafets ; receptacle 

 ked: egret stiped. (dandelion.) 



LACTU'CA. Calyx imbricate, cylindric, with the margin of the scale,, 

 oiembranaceous; receptacle naked; egret simple, stiped; seed smooth. 

 (lettuce.) 



CAB/'DUCS. Calyx ovate, imbricate with prickly scales; receptacle 

 villose; egret pilose. (comb-tooth thistle.) 



C*N"ARA. Receptacle bristly ; calyx dilated, imbricate, scales with 

 14 



