Stenandrium droseroides Nees

Franck, Alan R. & Daniel, Thomas F., 2015, Taxonomic and Nomenclatural Notes on Six Genera of Acanthaceae in the West Indies, Proceedings of the California Academy of Sciences 62 (10), pp. 309-329 : 320-322

6. Stenandrium droseroides Nees in Alph. de Candolle , Prodr. 11:284. 1847. Gerardia droseroides (Nees) S.F. Blake, Rhodora 20:68. 1918. TYPE.— CUBA. Province unknown: Without locality, 1825, de la Sagra s.n. (holotype: G [00464094]; isotype: GZU [000250674]; probable isotype, P). Figure 4C.

DISCUSSION.— Stenandrium droseroides has been reported from the Bahamas (Britton and Millspaugh 1920; Correll and Correll 1982) and Cuba (León and Alain 1957; Dietrich 1983, 1984). Lindau (1900) noted minor differences between S. droseroides and S. tuberosum (as S. rupestre ؊ He described bracts 6–7 mm long and pubescent foliage in S. tuberosum and bracts ca. 3 mm long and hirsute leaves in S. droseroides . León and Alain (1957) characterized bracts of S. droseroides as 3–5 mm long and Dietrich (1983) noted they were up to 9 mm long in S. droseroides . Dietrich (1984) then used the phrase “ Stenandrium droseroides s.l. ” but did not explicitly synonymize any names. Jennings (1917) expressed doubt that S. acuminatum and S. droseroides were distinguishable from S. tuberosum . The corollas of S. droseroides and S. heterotrichum are white, whereas all others within the S. tuberosum complex are said to be pink (León and Alain 1957; Dietrich 1983; Dietrich 1984).

The type specimen of S. droseroides was cited as a Ramón de la Sagra specimen from the de Candolle herbarium (at G), of which a duplicate is presumed to have been given to Nees. The label of the holotype at G has separate annotations matching the handwriting of Nees (as “ Stenandrium droseroides ”) and de Candolle (as “ Ramon de la Sagra”). The label of the isotype at GZU bears the handwriting of Nees. The label of the probable isotype at P matches the handwriting of de Candolle. The variability in leaf size and pubescence on the isotype specimen of S. droseroides at P is noteworthy. The specimen also erroneously contains a label for Crescentia cucurbitina L. collect- ed by Charles Wright which is not present on the sheet.

ห. Stenandrium droseroides subsp. droseroides .

ฬ. Stenandrium droseroides subsp. longibracteatum H. Dietr., Wiss. Zeitschr. Friedrich-Schiller Univ. Jena, Math. - Naturwiss, Reihe 32:851. 1983. TYPE.— CUBA. Matanzas: Mpio. Varadero, lomas de Camarioca al sur de cantel, suelo serpentinoso, 19 Jul 1977, Bisse et al. Fl. de Cuba 35002 (holotype: HAJB; isotype JE) .

DISCUSSION.— This subspecies has been reported only from Cuba. The bracts of Stenandrium droseroides subsp. longibracteatum were described as being 12–14 mm long ( Dietrich 1983).

Figures

FIGURE 4. A. Lectotype of Stenandrium tuberosum from Burman (1756). B. Illustration of Stenandrium pinetorum from Jennings (1917). C. Isotype of Stenandrium droseroides, de la Sagra s.n. [000250674]. D. Stenandrium (likely S. tuberosum), part of tab. 12 with description from page 30 of Plumier (1703, as “Gerardia”); a. flower, b. corolla separated from c. calyx, d. capsule, e. septum, f. seed. E. Holotype of Stenandrium bracteosum, Wilson 7472 [00114975], courtesy of the C. V. Starr Virtual Herbarium of The New York Botanical Garden. F. Lectotype of Stenandrium ovatum, Ekman 10701 [05-310]. G. Lectotype of Stenandrium crenatum, Ekman 8700 [05-307].