3i6 



primulAce/e 



base ; corolla yellow, rotate or cup-shaped ; capsule indehiscent or 

 2 — 5-valved. 



5. Trientalis. — Leaves cauline; calyx inferior, 7-partite, or 

 rarely 5 — 9 ; corolla white, rotate, without a tube ; capsule opening 

 with 5-revolute valves. 



6. Glaux. — Leaves cauline; calyx inferior, bell-shaped, 5-lobed, 

 coloured ; corolla absent ; capsule 5-valved. 



7. Anagallis. — Leaves cauline ; calyx inferior, 5-cleft to the 

 base; corolla rotate or funnel-shaped, with little or no tube; 

 ■filaments hairy; capsule splitting all round.. 



8. Centijnculu s. — 

 Leaves cauline ; calyx in- 

 ferior, 4 or 5-cleft to the 

 base ; corolla with an in- 

 flated, sub-globose tube, 4 

 or 5-cleft ; stamens 4 or 5, 

 with smooth filaments ; 

 capsule splitting all round. 



9. Samolus. — Leaves 

 radical and cauline; calyx 

 half-superior, 5-cleft, per- 

 sistent ; corolla salver- 

 shaped ; capsule opening 

 with 5 reflexed teeth. 



I. Hottonia (Water 

 Violet). — Floating aquatic 

 plants with whorled, finely 

 divided, pinnate, submerged 

 leaves ; flowers whorled, 

 stalked ; calyx 5-cleft almost 

 to the base ; corolla salver- 

 shaped, with a short tube ; 

 stamens 5 ; capsule many-seeded, with 5 valves cohering at the 

 top. (Named after Peter Hotton, Professor of Botany at Leyden.) 



1. H. paliistris (Water Violet). — The only British species, with 

 large, handsome, lilac flowers with a yellow eye, arranged in 

 whorls around a smooth, succulent, leafless stalk, which rises 

 several inches out of the water. — Ponds and ditches ; local. — Fl. 

 May, June. Perennial. 



2. Primula (Primrose).— Plants with a rhizome, radical, simple 

 leaves and flowers in umbels with an involucre ; calyx tubular, 5- 

 cleft; corolla salver- or funnel-shaped, with a long, cylindrical 



hott6nia pah!istris (JVater Violet). 



