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Project Name Data (Last Modified On 2/7/2013)

Flora Data (Last Modified On 2/7/2013)
Contributor J. A. DUKE
Description Perennial or annual herbs with usually opposite, often compound leaves, or lignescent vines wvith opposite, compound twining leaves; stipules usually absent; petioles not infrequently clasping. Flowers perfect, monoecious or dioecious, actin-omorphic or rarely zygomorphic, solitary, racemose or cymose, the floral parts often spirally arranged. Sepals 3-15, separate, imbricate (valvate in Cleinatis), often caducous, the inner often petaloid. Petals as many as or more than the sepals, occasionally absent and then the sepals petaloid, often with nectariferous glands. Stamens numerous, spirally arranged, separate, hypogynous, the anthers usually 2-celled, introrse, basifixed, longitudinally dehiscent. Carpels 1 to many, separate (connate in Nigella), 1-locular, 1-many-ovulate, the ovules anatropous; styles slightly bifid or absent, the stigmata then sessile. Fruit an achene, follicle, or rarely a berry, the seeds albuminous, the embryo small.
Habit herbs vines
Note A more or less cosmopolitan group, more frequent in temperate and arctic regions, the buttercup family consists of about 30 genera. Although the family contains a few poisonous and medicinal species, its chief economic value is the large number of hardy ornamentals.
Distribution In highland Central America, species of Aquilegia, Anemone, Delphinium, Nigella and Ranunculus are cultivated in flower gardens, but only three genera are known to occur naturally in Panama.
Key a. Lignescent vines climbing by means of foliar tendrils; leaves opposite, com- pound; flowers dioecious or polygamo-dioecious; achenes with an elongate plumose style .. 1. CLEMATIS aa. Herbs; leaves radical or alternate, simple or compound; flowers perfect or po- lygamous; achenes without a plumose style b. Leaves with 1-9 leaflets; flowers yellowish; petals present  .. 2. RANUNCULUS bb. Leaves with many leaflets; flowers greenish or whitish; petals absent ... 3. THALICTRUM
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