13. ELATINACE.i:. 
49 
2. P. serpi/lhicea ( Weill e); lower I. mostly ojiposite and 
crowded, st. long prostrate wiry much branched, racemes 
ultimately lateral, cal. -wings as in Sp. 1, bract shorter than the 
pedicel. — S//. E. B. 187. F. depres&a (Wend.)— Upper part of 
St. and ped. sep. pet. and caps, sometimes pubescent (P. ciliata 
Lebel.).— Dry pastures. P. VI.— IX. E. S. I. 
3. P. calcdrea (F. Sch.) ; I. chiefly in an irregular terminal 
rosette large obovate blunt, those of fl.-st. short smaller lanceo- 
late, cal.-wings oblong their veins branched the lateral looping 
with a branch from near the middle of the central vein, caps, 
oblong-obcordate, bract shorter than the pedicel. — P. amara 
Don, E. B. S. 2764. P. amarella Coss. et Germ. Atl. t. 7.— 
St. weak, procumbent or ascending, nearly naked below. Fl.-st. 
several frujn the a.rils of the term, rosette, simple, short ; racemes 
terminal. ■ Fl. blue. Lobes of aril unequal, lateral i as long as 
seed. — Chalk hills, rare. P. V. E. 
4. P. amdra (L.) ; lorver I. larger obovate blunt in a basal 
rosette, upper 1. oblong-lanceolate, cal.-wings oblong or obovate 
blunt their veins simjyle or slightly branched free, caps, cbcordate 
broader than the wings, lateral bracts shorter than the pedicels. 
— Ilosette at crown of rootstock, its 1. much the largest 
broad rounded at the end. Fl.-st. from the axils of the rosette, 
simple, short ; upper 1. acute ; racemes terminal. Cal.-wings 
longer than caps. Lobes of aril nearly equal, blunt, ^ as long 
as seed. — a. P. austriaca (Cr.) ; caps, rounded at the base, fl. 
very small, pinkish 1 or pure white. Sy. E. B. 189 — 
/3. P. idiginosa (R.) ; caps, rather wedgeshaped below, fl. larger, 
blue. — a. Wye Downs [and near Sevenoaks], Kent. Caterham, 
Surrev, Mr W. Whitwell. fi. Cronkley Fell, Yorkshire, 
Mr James Backhouse. P. VI. VII. E. 
Order XIII. ELATINACE^. 
Sep. 3 — 5, distinct, or slightly connate. Pet. -3—5. Stam. 
as many or twice as many as the pet., free. Caps. 3 — ."j-celled, 
3 — 5-valved, loculicidal, dissepiments adhering to central axis. 
Styles 3 — 5 ; stigmas capitate. Seeds many, albumen 0, embryo 
curved with the seed. — L. opposite. Stip. minute or inconspi- 
cuous. 
1. Elatine. Cal. 3 — 4-parted. Pet. 3 — 4. Stam. 3 — 4 or 
6 — 8. Styles 3 — 4. Caps. 3 — 4-celled, many-seeded. Seeds 
cylindrical, straight or bent. 
D 
