Ord. 1.] PENTANDRIA MONOGYNIA. 37 



Clay ditches & ponds. 1£ .7. Stem slender, 1 — 2 f Spike small, ovate. 



13. P. pectinatum, 5. 323. (Fennel-leaved P.) Leaves bristle-shaped, 



single-ribbed, parallel, thickly set in two ranks ; sheathing at the 



base. Spikes interrupted. 



Ditches of fresh or salt water. If.. 7. Fl. 2 or 3 together, dull green. 



82. RuPPIA. Ruppia. 



1. R. maritima, 2. 136. (Sea R., Tassel Pond-weed. 



Salt-water ditches. If ? 8, 9. L. linear, immersed. Sp. 2 — 4JI. 



83. SAGlNA. Pearl-wort. 



1. S. procumbens, 13.880. (Procumbent P.) Stems procumbent, 



smooth. Leaves minutely pointed. Petals half as long as the calyx. 

 Rubbish & gravelly banks. If. . 5 — 8. Stems 2 — 4 in. rooting. L. evergr. 



2. S. maritima, 31. 2195. (Sea P.) Stems nearly upright, divari- 



cated, smooth. Leaves obtuse without bristles. Petals none. 

 High mount, and sea-coast. 0. 5 — 8. Stems 2 or 3 in., purplish. 



3. S. apetala, 13. 881. (Small-flowered P.) Stems nearly upright, 



hairy. Leaves bristle-pointed, fringed. Petals none, or very small. 

 Gravel & rubbish. .5, 6. Fl.-stalks long and hairy. Pet. white, or 0. 



84. MceNCHIA. Mcenchia. 

 1. M. erecta, Sagina erecta, 9. 609. (Upright M.) 

 Gravelly past. 0. 5. Glauc. Fl. glistening. 



85. TILL & A. Tillsea. 

 1. T. muscosa, 2. 116. (Mossy T.) Stems procumbent. Flowers 

 sessile, mostly three-cleft. 

 Barren sandy heaths. . 5,6. Stems 1 — 2 in. reddish. Stam. 3. 



86. RADIO LA. Flax-seed. 

 1. R. millegrana, 13. 893. (Thyme-leaved F.) 

 Wet sandy gr. 0. 7, 8. Smooth, erect, 1 — 2 in. forked. Fl. white. 



Class V. PENTANDRIA. Stamens 5. 

 Order I. MONOGYNIA. Style 1. 



Asperifoliae L. — N.O. Boragine^e. 

 * Fl. of 1 pet., inferior, with 2 or 4 naked seeds. 



96. ECHIUM. Throat of the cor. dilated, naked ; limb irregular. 

 Stigma deeply cloven. 



91. PULMONARIA. Cor. naked in the throat, funnel-shaped. 



Calyx prismatic, 5-cleft at the margin. 

 88. LITHOSPERMUM. Cor. naked in the throat, funnel-shaped. 

 Cal. in 5 deep segments. 



92. SYMPHYTUM. Cor. closed with awl-shaped converging valves; 



limb bell-shaped. 



