Pycnostachys

subsp. var.

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Standard Cyclopedia of Horticulture
Pycnostachys (Greek, thick spike, referring to the heavy spikes of fls.). Labiatae. Erect perennial herbs: lvs. opposite, broad or narrow, sessile or petioled: whorls condensed into a dense terminal spike; fls. bright blue or violet; calyx slightly accrescent, 5- toothed; corolla-tube longer than the calyx, upper lip short, 4-toothed, lower longer, deeply concave; stamens 4: nutlets subglobose, smooth.—About 40 species, natives of Trop. and S. Afr., 1 in Madagascar. P. urticifolia, Hook. A much-branched perennial herb, 5-7 ft. high: lvs. ovate-acute, deeply cut, crenate, densely pubescent: spikes very dense, 2-3 in. long; corolla bright blue. Trop. and S. Afr. B.M. 5365. More or less frequent in gardens in England. P. Dawei, N.E. Br. A stout herb, 4-6 ft. high and loosely branched pyramidal habit: lvs. narrowly lanceolate, acuminate, serrate: fls. many, crowded, in short spikes terminating all the branches, cobalt-blue; calyx-teeth needle-like. Trop. Afr. Intro. into England. B.M. 8450. P. caerulea, Hook., with 4-sided st. about 1 ft. high, bright blue fls. and sessile oblong or linear-lanceolate lvs., a native of Madagascar, has also been cult. in England. The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

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