On the Apocynaceae of South America, with some preliminary remarks on the whole family / by John Miers.

Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: On the Apocynaceae of South America, with some preliminary remarks on the whole family / by John Miers. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    above very laxly branched, lower branches 1^ in. long, again branching and bearing about 5 lax flowers on slender bracteolated pedicels 2 lines long; sepals acuminately lanceolate, margins pellucid, 1|- line long, each with 2 lanceolate inner scales; corolla 3| lines long; tube 2^ lines long; segments 1J line long, acutely oblong, membranaceous, with dextrorse convolution, all glabrous; stamens almost wholly included, inserted in a pilose ring; anthers acuminate, with 2 long slender basal prongs ; disk of 5 oblong lobes, as long as the 2 glabrous ovaries; 2 follicles, slender, acute, glabrous, 6-8 in. long. This species, in its inflorescence and floral structure, closely resembles the preceding from the same region, both being quite in accordance with Thyrsanthus; it is therefore neither a Forsteronia nor a Secondatia, more especially differing from the latter in its slender follicles, the seeds of which are not said to be comose. 17. Thyrsanthus pyriformis, nob. In Antillis: v. s. in herb. Mus. Brit. Cuba (Sagra 141). A species near the two following. It has slender, pallid, striolate, dichotomous branches, with axils 1-1^ in. apart; leaves obovate, subcuneate below the middle, rounded and mucronulate at the summit, very glabrous, thinly chartaceous, flat, palish green above, opake, finely corrugulate, fine ascending nerves scarcely prominulent, with 2 minute glands at the base of the subimmersed midrib, pale yellow and opake beneath, the slender nerves scarcely visible, 2-2^ in. long, l^lf in, broad, on slender channelled petioles 4-5 lines long; panicle terminal, 2^ in. long, on a peduncle bare at the base for 6 lines, bifid, and again dichotomously branched, each branch bifid and bearing 2 fascicles of small, approximate flowers on pedicels 1^ line long, supported by acute membranaceous bracteoles ^ line long, all slightly puberulous; sepals obtusely oblong, with membranaceous margins, puberulous within along the nerve, | line long; corolla reddish, glabrous, 2^ lines long; tube 1-| line long; segments 1^ line long, oblong, with dextrorse convolution; stamens mostly included; anthers apiculate, with 2 long parallel basal prongs; disk of 5 free oblong lobes, as long as the 2 puberulous ovaries. 18. Thyrsanthus parviflorus, nob. : Tabernamontana parviflora, Poir. Diet. Suppl. v. 276; A. DC. I. c. p. 374. In Amer. meridionali: non vidi. A species near T. populifolius, with slender branchlets; leaves oval-lanceolate, obtuse at the base, acuminate, glabrous, dark green above, yellowish beneath, 2 in. long, 1 in. broad, petiolated; panicles terminal, geminate, subcymose, bearing many subumbellate small flowers, on short bracteolated pedicels. 19. Thyrsanthus fasciculatuS; nob.: Tabernosmontana fasciculata, Poir. Diet. vii. 531; A. DC. /. c. p. 375. In Cayenne : non vidi. A species near the preceding. Its leaves are ovate-lanceolate, obtusely acuminate, 2-3 in. long, 1| in. broad, petiolated; panicles cymose, axillary, divided, with many small flowers fasciculate at the ends of each ramification; tube of corolla 2-3 lines long, with linear segments.