TAXONOMY 
369 
a capsule with three valves. Seeds strophiolate with albuminous 
embryo. 
Habitat 
Lower California 
and Mexico 
Passifloracece or Passion Flower Family. —Herbaceous or woody 
vines climbing by tendrils. Leaves alternate, simple, entire, lobed 
or compound. Flowers perfect or imperfect, solitary; peduncles 
jointed at the flower; perianth petaloid with urceolate or tubular 
tube and four to five or eight to ten partite and two-seriate limb, the 
throat usually crowned by one or more series of subulate filaments 
which are frequently colored; gynophore elongating supporting the 
stamens and pistil. Fruit a one-celled berry (. Passiflora ) or three- 
to five-valved dehiscent capsule containing numerous seeds. 
Official drug Part used Botanical origin Habitat 
Passiflora N.F. Entire herb Passiflora-incarnata United States 
Caricaceoe or Papaw Family. —A family of latex-containing trees 
composed of two genera indigenous to tropical America. Of chief 
pharmaceutic interest is the species Carica Papaya , the Papaw or 
Melon tree, the fruit of which yields Papain, a valuable digestive 
ferment. This plant is a tree about 20 feet high which bears at its 
summit a cluster of deeply lobed petiolate leaves and dioecious flow¬ 
ers. The fruit is a berry, the size of one’s head and contains an acrid 
milky juice from which papain can be precipitated by the addition 
of alcohol. 
Cistaceoe or Rock Rose Family. —Herbs or shrubs whose stem and 
branches are often glandular, pubescent or tomentose, with simple 
or stellate trichomes. Leaves simple, entire, the lower ones opposite, 
upper alternate. Flowers perfect, regular, terminal, and solitary 
or in cymes or unilateral racemes; sepals five, the two external ones 
often bractiform or wanting; petals five ( Helianthemum ) rarely three 
or none (. Lechea ); stamens hypogynous, indefinite; carpels three to 
five, ovary free, one-celled. Fruit a one-celled, three- to five-valved 
capsule. 
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