APPENDIX II 



THE GENERA OF 

 BRITISH FLOWERING PLANTS 



In the following- summary 520 genera are in- 

 cluded. A few must be regarded as British, only 

 because the species have become established here 

 in various ways. The European flora includes a 

 far larger number of genera; and of the British 

 genera none can be regarded as peculiar, so in- 

 timately allied is the British 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 of British 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 spontaneously for but 

 a year and then disappear. As, however, such 

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

 selves widely and 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^E 



1. Clematis. Climbing shrub; leaves opposite; 

 sepals 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 many. 



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 8-10, tubular, with long claw, 2-lipped; 

 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, funnel-shaped, irregular, with horn-like 

 spur; follicles 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, many-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. Actasa. Flowers more or less regular; 

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

 fruit a berry, many-seeded, not bursting. 



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

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

 seeded, opening inwards. 



Order 2. BERBERIDACE^ 



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. 



18. Nymphaea. Flowers regular, yellow; sepals 

 5-6; petals numerous, on receptacle; stigma 

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

 seeded. 



