SUPPLEMENT. 
THE FAMILIES OF FLOWERING PLANTS. 
By CuHaries Lours PoLuarp. 
CHAPTER XX. 
Order Sarraceniales. 
This interesting group of three families, Sarraceniaceae, Nepentha- 
ceae and Droseraceae, is justly celebrated on account of the wonderful 
adaptability of the leaves as insect traps. The plants are all herbs, 
frequently of scapose or stemless habit, : 
with solitary or racemose flowers hav- 
ing the ovary free from the calyx, be- 
coming a capsule in fruit. The leaves 
vary in the different families; in Sarra- 
ceniaceae and Nepenthaceae they form 
hollow receptacles which serve to catch 
and retain water; numerous insects 
crawl into the “pitchers,” and being 
unable to escape, fall to the bottom, 
where they are gradually macerated, 
the liquid being ultimately absorbed. 
In Droseraceae the leaf surface, as will 
be explained later, acts as a trap for 
small insects. The group as a whole 
is tropical, although with some repre- 
sentatives in temperate regions. 
Family Sarraceniaceae. Pitcher- 
plant Family. Consists of three gen- 
era, Sarracenia, Chrysamphora, and 
Heliamphora, the last two monotypic, Fig. tor. The huntsman’s cup or purple 
the first containing about 8 Hasire piiober pias (Rarrtenee peter) ATES 
They are marsh plants with tubular ‘ccna Saas shi 
leaves, and large scapose nodding flowers. The sepals are 4 or 5, per- 
sistent; the petals 5, or sometimes wanting; stamens numerous; ovary 
several-celled, with a peculiar peltate (umbrella-shaped) style. (See 
Fig. 101.) 
