A Key to the Common Families of Seed Plants in the Central United States ...

Cover A Key to the Common Families of Seed Plants in the Central United States ...
A Key to the Common Families of Seed Plants in the Central United States ...
John Henry Schaffner
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Calyx deciduous of 4 sepals, capsule of 2 carpels 2-valved; sap not milky; herbs with alternate leaves mostly palmately com- pound, capparidaceae. (467).
43. Calyx persistent of 3 or 5 sepals; low shrubs or herbs; leaves simple mostly entire, the lower usually opposite, the upper alternate. CISTACEAE. (630).
44. Calyx valvate in the bud. 45.
44. Calyx imbricated in the bud; hydrophytes; carpels numerous (Monocotyledones). nymphaeaceae. (406).
44. Calyx imbricated in the bud, persistent; ovulary
... 3-5-locular; insectivorous marsh herbs with hollow pipe-like leaves.
SARRACENIACEAE. (470).
45. Calyx of 5 sepals and usually a large number of petals which may be small and glandular; herbs with alternate finely-dis- sected leaves. ranunculaceae. (411).
45. Calyx persistent, stamens united by their filaments into a tube; herbs or shrubs with alternate palmately-veined leaves with stipules. Malvaceae. (617).
45. Sepals and petals usually 5, the lower half of the calyx united with the ovulary; shrubs or herbs with simple opposite leaves and no stipules.


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