Ixxvl _ INTRODUCTION. 
XIII. Portulacesze. As in Caryophyllacez, but only two sepals and 5 
or more petals. 
XIV. Tamariscinesee. Shrubs with alternate green scale-like leaves. 
Flowers regular. Capsule one-celled. Seeds with a tuft of wool. 
XV. Elatinaceee. Asin the Pink family, but the capsule divided into 
cells. 
XVI. Hypericinese. Leaves opposite. Flowers regular. Sepals imbri- 
cate. Flowers indefinite, in 3 or 5 clusters or bundles, . 
XVII. Linacez. Leaves entire. Petals convolute, distinct. Stamens 
definite. Capsule separating into carpels without leaving a central 
axis, 
XVIII. Malvaceze. Sepals valvate. Petals convolute, adhering at the 
base to the staminal tube. Stamens indefinite, monadelphous, with one- 
celled anthers, 
XIX. Tiliaceze. Trees. Sepals valvate, Petals free. Stamens in- 
definite. 
XX. Geraniaceze. Petals convolute or very irregular. Stamens 
definite. Capsule with several cells and lobes round a persistent central 
axis. 
XXI. Aceraceze (genus or tribe of Sapindacee). Trees. Leaves opposite. 
Stamens definite, but seldom isomerous. Fruit separating into 2 (rarely 3) 
winged nuts. 
Subclass 2. CaLycIFLOR#.—Petals usually distinct, and stamens perigy- 
nous or epigynous. 
* Stamens and petals mostly perigynous (except in the Crassulacee, 
Cucurbitacee, and Ribesiacee families.) 
XXII. Aquifoliaceze. Shrubs or trees with small flowers. Petals shortly 
united at the base. Stamens alternating with them. No disk. Ovary © 
syncarpous, free. 
XXIII. Celastracee. Shrubs or trees, with small regular green 
flowers. Stamens alternating with the petals, on a disk lining the base of 
the calyx. 
XXIV. Rhamnacez. As in Celastracesze, but the stamens are opposite 
the small concave or scale-like petals. 
XXV. Papilionacese (a tribe of Leguminosee). Flowers very irregular, 
papilionaceous. Stamens 10, all, or 9 of them, combined. Ovary of one 
carpel. 
XXVI. Rosaceze. Flowers regular. Stamens indefinite. Ovary (at 
least when young) apocarpous. : : | 
XXVII. Onagraceze. Perianth in twos or fours, Stamens definite, 
Ovary inferior. One style. ‘ 
XXVIII. Lythariezs. Stamens usually definite, inserted with the 
petals at the top of the calyx-tube. Ovary syncarpous within the base of 
the tube. One style, Lower leaves opposite. 
XXIX. Cucurbitaceze. Climbers with tendrils. Flowers unisexual. 
Ovary inferior. 
. XXX, Crassulaceee. Leaves succulent. Sepals, petals, stamens of one 
or two rows, and free carpels, all isomerous. 
