APPENDIX II 



THE GENERA OF 

 BRITISH FLOWERING PLANTS 



In the following' summary 520 genera are in- 

 cluded. A lew must be rejjarded as British, only 

 because the species have become established here 

 in various Wiiys. The Eui'opean flora includes a 

 far larjjer number of j^euera; and of the British 

 g'enera none can be regarded as peculiar, so in- 

 timately allied is the Brilisli insular flora to that 

 of the mainland. Had one included all the genera 

 noticed in this country, embracing a large number 

 of species (1000 or more) whose occurrence is 

 more or less accidental, sporadic, or ephemeral, 

 the list would have been considerably extended. 

 (See Druce's List 0/ Brilisli Plants, Oxford.) But 

 many of the plants that have found a place here 

 are little removed from the garden, their place 

 of origin, or similar habitats, and one cannot in- 

 clude here many species that figure in horticultural 

 lists, since they may persist spontaneouslj' for but 

 a year and then disappear. As, however, such 

 plants come, from time to time, to establish them- 

 selves widely ;uid tenaciously in these islands, one 

 can no longer ignore their claim to a place in our 

 flora, cosmopolitan and adventitious as a large 

 part of it must be considered. This is the line 

 adopted here. 



Order i. Ranunculace.^ 



1. Clematis. — Climbing shrub; leaves opposite; 

 sep:ils valvate, 4-6; fruit an achene; styles 

 feathery, persistent, many ; stamens many. 



2. Thalictrum. — Herbaceous plants; involucre 

 o; sepals imbricate, 4-5, petaloid; fruit an achene, 

 without awns; styles and stamens manj'. 



3. Anemone. — Involucre of 3 leaves; sepals, 5- 

 20, petaloid; carpels in head, not bursting, tipped 

 with persistent styles; styles and stamens many; 

 fruit an achene. 



4. Adonis. — Involucre o; calyx of 5-8 sepals; 

 petaloid; petals 5-16; no honey glands; carpels 

 awnless, not bursting; stamens and styles many. 



5. Myosurus. — No involucre; sepals 5, spurred; 

 petals 5, with tubular claw; receptacle elongated; 

 stamens 5; carpels imbricate; seed pendulous. 



6. Ranunculus. — Sepals imbricate, 5, rarely 3; 

 petals 5, rarely more, with honey glands; with or 



without a scale; carpels not bursting, in head; 

 fruit an achene; seed ascending. 



7. Caltha. — Sepals imbricate 5, petaloid, de- 

 ciduous; no petals; follicles 5-10, many-seeded, 

 bursting; stamens numerous. 



8. Trollius. — Sepals 5, imbricate, deciduous, 

 petaloid; petals 5-15, small, clawed; flowers 

 globular; follicle many-seeded. 



9. Helleborus. — Sepals 5, green, persistent; 

 petals S- 10, tubular, with long claw, 2-lippcd ; 

 follicles 3-10, sessile, many-seeded. 



10. Eranthis. — Sepals 5-8, petaloid, deciduous; 

 petals 5, small, 2-lipped, tubular, claw long, inner 

 lips short; follicles stalked, 3-8, many-seeded. 



11. Aquilegia. — Sepals 5, petaloid, deciduous; 

 petals 5. lunnel-shaped, irregular, with horn-like 

 spur; (ollicles 5. 



12. Delphinium. — Flowers irregular; sepals 5, 

 petaloid, deciduous, dorsal (upper) spurred; petals 

 4, 2 upper enclosed in spurred sepal; follicles i, 3, 

 or 5, m.aii}*-seeded. 



13. Aconitum. — Flowers irregular; sepals 5, 

 petaloid, upper one hooded, helmet-shaped; petals 

 2-5, 2 upper tubular on long stalks enclosed in 

 spurred sepal; follicles 3-5, many-seeded. 



14. Actaea. — Flowers more or less regular; 

 sepals 4, petaloid, soon falling; petals 4, small; 

 fruit a berr\', niitny-seeded, not bursting. 



15. Paeonia. — Flowers regular; sepals 5, per- 

 sistent; petals 5, or more; follicles 2-5, many- 

 seeded, opening inwards. 



Order 2. BERBERIDACEiE 



16. Berberis. — Shrub, with spines; flowers 

 yellow, in raceme; sepals, petals, stamens, 6; fruit 

 .a berry, 2-3-seeded. 



17. Epimedium. — Herbaceous, woody plant; 

 sepals 4, deciduous; petals 4; stamens 4; nec- 

 taries 4; fruit a capsule, many-seeded. 



Order 3. Nymph.«ace.e 



18. Nymphaea. — Flowers regular, yellow; sepals 

 5-O; petals numerous, on receptacle; stigma 

 sessile, with many rays; fruit a berry, many- 

 seeded. 



