XXiV Introduction. 
t Leaves alternate, stipulate. 
* Carpels more or less united, often forming a fleshy fruit. 
Trees and shrubs having white, pink, or scarlet flowers, 
Rosacea, tribe Pomee, page 171 
Tf Leaves exstipulate. 
Placentas spread over the dissepiments. 
Water-plants with showy flowers and orbicular floating 
leaves m a “ ‘ Z s Nympheacce, p. 34 
Placentas parietal. 
Petals definite in number, distinct from the calyx. Climb- 
ing or trailing herbs with hispid, often pungent hairs, 
Loasee, p. 208 
Sepals and petals numerous, passing gradually from one 
into the other. Fleshy, often prickly plants. Cactee, p. 208 
Placentas axile. 
Shrubs having or leaves furnished with translucent 
dots . : f Myrtacee, p. 193 
Petals very numerous. Trailing oe with fleshy leaves, 
Ficoidee, p. 208 
Petals few, strap-shaped. Trees with simple alternate 
deciduous leaves and small capitate polygamous 
flowers. ‘ Nyssa, p. 217 
Petals few, oval or dienes Shrubs with decline oppo- 
site leaves, and white, fragrant flowers Philadelphus, p. 185 
8§ Ovary wholly superior. 
f Leaves stipulate. 
* Carpels more or less distinct (at least when young), or 
solitary. 
Stamens hypogynous. 
Carpels numerous. ‘Trees or shrubs having alternate 
stipulate leaves and usually showy fragrant flowers, 
Magnoliacee, p 28 
Stamens perigynbdus. 
Carpel one ‘i . . . Rosacee tribe Prunee, p. 140 
Carpel more than one . Rosacea, p. 142-170 
** Carpels wholly combined into a solid ‘pial, with more pla- 
centas than one. 
Calyx with an imbricated estivation. 
Placentas parietal. 
Shrubs with alternate or opposite leaves and showy 
fugacious flowers having crumpled petals Cistinee, p. 55 
Placentas axile. 
Trailing herbs with succulent leaves and showy flowers 
haying a calyx of two sepals united at the base, 
Portulacee, p. 74 
Calyx with a valvate estivation. 
Stamens monadelphous. 
Anthers 2-celled. Deciduous shrub with petaloid yellow 
sepals . .  Fremontia, p. 84 
Anthers 1-celled. Hehe or aintie having showy 
flowers. Petals usually oblique and twisted in 
estivation .  .  . gw. Malgacee, p. 79 
