Tillandsia rotundata
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Tillandsia rotundata
Formerly T. fasciculata var. rotundata
See key on T. fasciculata page.

Rob Bower 03/17
Dale Dixon 11/20

Rob Bower 11/20
Rob Bower ... "A nice chunky tillandsia 80 - 90 cm high. The first 3 are flowering now and 4th is from a plant that flowered previously. A slightly different shaped inflorescence. I bought half a dozen fasciculata looking plants with no labels and it's a nice lottery seeing what they produce when they flower."
Rob Bower 12/21
Adam Bodzioch 04/22
Adam Bodzioch ... "I got this one many years ago from Len Cork (deceased) one of the early members of the Brom Soc of SA. I assume that it is a form of fasciculata and quite attractive."

Tillandsia rotundata (L. B. Smith) C. S. Gardner, stat. nov. in Selbyana 7: 369, 371. 1984

Basionym: Tillandsia fasciculata Swartz var. rotundata L.B Smith, Contr. Gray Herbarium 154: 36, pl. 4, figs. 6,7,1945.
Type: GUATEMALA: HUEHUETENANGO: Carrizal, 1942, Steyermark 50809 (Holotype: F).

Additional material examined: MEXICO: CHIAPAS: Las Casas, 1957, Foster & VanHyning 2952 (US); AGUACATENANGO, Venustiano Carranza, 1965, Raven & Breedlove 20095 (DS, US); Comitan de Dominguez, 1965, Breedlove 9831 (DS, US); Rincon Chamula, 1981, Gardner 1410 (SEL); Campo Santiago, S of San Cristobal de las Casas, 1981, Gardner 1419 (SEL); Gardner 1086 (SEL,US). GUATEMALA: MORAZON: Rio Yeguare, ca.14deg N, 87deg W, 1949, Williams 15997 (EAP, F, US). HONDURAS: Morazan, 1964, Gilmartin 938 (US); Gilmartin 981a (US).

Distribution: Chiapas, Mexico, Guatemala, and Honduras.

Several characteristics distinguish this species from T. fasciculata Swartz.
Inflorescence is a globose head of densely digitate spikes or branches that are nearly as broad as they are long. The branches of T. fasciculata var. fasciculata are distinctly lanceolate, and more than three times longer than broad.
Branches of T. rotundata are subtended by sub-orbicular primary bracts.
Floral bracts are cucullate, slightly inflated, and nearly as broad as they are long, whereas the width of the floral bracts of several specimens of T. fasciculata is approximately one-half the length.
The abaxial surfaces of the floral bracts are slick and polished as if lacquered deep red. The surfaces of the floral bracts of T. fasciculata are smooth but not polished.
Habitat of T. rotundata is typically at higher elevations than T. fasciculata although there is some overlap.
Tillandsia rotundata is reported at between 1400 and 2500 meters, and all varieties of T. fasciculata (except var rotundata) occur between sea level and 1880 meters (Smith & Downs, 1977).
Tillandsia rotundata typically occurs in pine and oak forests.

Detail from L.B Smith, Contr. Gray Herbarium 154: 36, pl. 4, figs. 6,7, 1945.
Tillandsia fasciculata Sw. var. rotundata, var. nov., inflorescentia globosa; bracteis primariis suborbicularibus, apiculatis; spicis ovatis, complanatis, 4-6 cm. longis; bracteis florigeris cucullatis, ex sicco plus minusve rugosis. Tab. IV, fig. 6, 7:
GUATEMALA: Zacapa: San Lorenzo, alt. 1600 m., Jan. 24; 1942, Steyer¬mark .43158 (G, CM); HUEHUETENANGO: Carrizal, Aug. 17, 1942, Steyermark 50809 (CM, TYPE; phot. G).
HONDURAS: COMAYAGUA: epiphytic in forest near El Achote, above the plains of Siguatepeque, alt. 1350 m., July 15, 1936, Yuncker, Dawson & Youse 5897 (CM).

This variety is easily distinguished by its very short broad primary bracts and spikes.

Tillandsia fasciculata var rotundata L. B. Smith, Contr. Gray Herb. 154: 36, pI. 4, figs. 6,7. 1945.

Desc from S&D
Inflorescence globose;
Primary bracts suborbicular, apiculate;
Spikes ovate, complanate, 4-6cm long.
Floral bracts cucullate, more or less rugose when dry
Type. Steyermark 37390 (holotype F), Carrizal, Huehuetenango, Guatemala, 17 Aug 1942.
DISTRIBUTION. Epiphytic in forest, 1400-2500 m alt, southern Mexico, Guatemala, Honduras.
MEXICO - Chiapas: Tuxtla to Las Casas, 5 Apr 1957, Foster & Van Hyning 2952 (US);
Aguacatenango, Venustiano Carranza, 28 Jan 1965, Raven & Breedlove 20095 (DS, US); Comitan de Dominquez, 29 Apr 1965, Breedlove 9831 (DS, US). GUATEMAIA. Baja Verapaz: Salama, 11 Jul 1960, King 3285 (TEX, US). Zacapa; San Lorenzo, 24 Jan 1942, Steyermark 43158 (F, GH). HONDURAS. Comayagua: El Achote, Siguatepeque, 15 Jul 1936, Yuncker, Dawson & Youse 5897 (F). Morazan: Rio Yeguare, ca 14°N, 87°W, 11 Sep 1949, Williams 15997 (EAP, F, US); Zamorano, Jul 1964, Gilmartin 938 (US); 981 (US).

Updated 24/04/22