Flowers. xxi 



(c] Petals, four, united. Madder Fam. No. 12 (Rubiaceae/ 



page 96. 

 (c) Petals, five, united. Honeysuckle Fam. No. n (Capri 



foliacese), page 87. 



2. Sepals not attached to the seed-case, 

 (a) Corolla irregular. 



(b} Prostrate ; flowers blue. Gill-over-the-Ground in Mint 



Fam. No. 21 (Labiate), page 152. 

 (b) Climbing ; flowers scarlet. Trumpet-Creeper in Bignonia 



Fam. No. 20 (Bignoniaceae), page 151. 

 (a) Corolla regular. 



(b) Stamens of the same number as the united petals. 



(c) Seed-cases, two ; separate. Milkweed Fain. No. 



17 (Asclepiadaceae), page 124. 

 (<:) Seed-case one. 



(a) Stamens free from the corolla, but inserted with its 



base. Heath Fam. No. 14 (Ericaceae), page 106. 



(d} Stamens adherent by their sides to the tube of the 



corolla. Pyxie Fam. No. 15 (Diapensiaceae), page 



121. 



(d] Stamens adherent by their bases to the tube of the 



corolla. 

 (e) Seeds few, one or two in each cell. Morning-Glory 



Fam. No. 18 (Convolvulaceae), page 127. 

 (e) Seeds, many. Nightshade Fam. No. 19 (So- 

 lanaceae), page 146. 



DIVISION III. Petals wanting (Apetalous). 



(a) Seed-case, one, attached to the sepals. Pipe-Vine in Birth- 

 wort Fam. No. 23 (Aristolochiaceae), page 163. 

 (a) Seed-case, one, free from the sepals. 



(b} Leaves alterriate. Buckwheat Fam. No. 22 (Poly- 



gonaceas), page 157. 

 (b) Leaves opposite. Hop in Nettle Fam. No. 24 (Urti- 



caceae), page 164. 



(a) Seed-cases, numerous, with single seeds (achenes). Clematis 

 in Crowfoot Fam. No. i (Ranunculaceae), page 4. 



CLASS SECOND. Flowers, with the sepals and the petals 

 never in fives usually in threes. Leaves strongly 

 veined from base to apex, the veins more or less 



