This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(after Samuel Doody, London apothecary). Polypodiaceae. Greenhouse ferns.
Sori curved, placed in one or more rows between the midribs and the margins of the pinnae: leaves rigid. A genus of diminutive ferns related to Woodwardia. - Species 4 or 5. Ceylon to New Zeal.
All doodias, except D. blechnoides, are of dwarf habit, and are useful for fern-cases and for edgings of window boxes. Cool and intermediate temperatures are best. They are excellent for forming an undergrowth in coolhouses, as they seldom are infested with insects, and endure fumigation. Schneider recommends three parts of peat and one of silver sand. Loam does not help, but a little chopped sphagnum does. They are very sensitive to stagnant water, and do not like full exposure to sunlight. Always propagate by spores, but division is possible.
A. Leaves pinnatifid.
R. Br. Leaves 6-18 in. long, 2-4 in. wide, pinnatifid, narrowed gradually below: sori in 1 or 2 rows. Temp. Austral. - Crested varieties occur in cultivation
aa. Leaves pinnate in the lower half. media, R. Br. Leaves 12-18 in. long, with pinnae 1-2 in. long, the lower one gradually smaller. Austral, and New Zeal. - D. Kunthiana, Gaud., from the Hawaiian Isls. has close median pinnae. D. superba, Hort., is a larger garden form.
R. Br. Leaves 6-12 in. long, with pinnae about an inch long, the spore-bearing ones shorter; apex often terminating in a long point. Austral, and New Zeal.
Cunn. Leaves 18 in. long; If . - blades 15 in. long, 6 in. broad, broadest at the middle, the lowest pinna? considerably narrowed; margins serrate: sori in an irregular row near midrib. New S. Wales.
L. M. Underwood.
R. C. Benedict.!
DO REM A (dorema, a gift, an allusion to the gift of gum ammoniac). Umbelliferse. About 4 odd large perennial herbs of S. W. Asia, yielding gum-resins, likely to be met with in collections of economic plants. Usually glaucous, with pinnately decompound leaves, and small white or yellow flowers in close woolly umbels: calyx-teeth wanting or nearly so; petals ovate: fruit ovate, piano-compressed. D. Ammoniacum, D. Don, an erect fleshy-stemmed herb to 7 ft., with a few leaves near the base and bracts above, yields gum-ammoniac, a medicinal product. This resin exudes on the sting of insects, occurring in yellowish brown "tears" or drops; it has a balsamic odor and bitter unpleasant taste. The plant is native in Persia and Afghanistan. Other species yield similar exudation.