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| Pitcairnia anarosae Gonz.-Rocha, Mejía-Marín & Espejo
in Mejía-Marín, González Rocha & Espejo-Serna, 2020.
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Abstract
Pitcairnia anarosae, known until now from the municipality of San Juan Colorado, Oaxaca, Mexico, is described and illustrated. The new species is compared with P. singularis, from which differs by the plant height (19–40 vs 15–25 cm) the number of leaves (5–8 vs 3–4), and the morphology, color (red vs white) and length of flowers.
Keywords: Jamiltepec, Región Costa, San Juan Colorado, Monocots
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FIGURE 1. Pitcairnia anarosae. A. flowers; B. dissected flower (B1. floral bract; B2. sepals; B3. petals; B4. stamens; B5. Pistil); C. inflorescence; D. habitat; E. fruits; F. detail of the basal portion of the plant, showing the reduced sheath like leaves, and the normal leaves.
Photographs: A. L. Jimena Hernández-Barón; B. Edith González-Rocha; C-F. Adolfo Espejo-Serna.
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| FIGURE 2. Herbarium specimens and dissected flowers: A & C. Pitcairnia anarosae (M. I. Mejía Marín et al. 951b, UAMIZ); B & D. P. singularis (A. Flores-Argüelles y A. Romero-Guzmán 776 UAMIZ). |
Pitcairnia anarosae Gonz.-Rocha, Mejía-Marín & Espejo, spec. nov.
Diagnosis:— Pitcairnia anarosae is morphological similar to Pitcairnia singularis from which it differs by the number of photosynthetic leaves per rosette (5–8 vs. 3–4), the petal morphology (obovate-spathulate with rounded apex vs. oblanceolate-spathulate with acute apex) as well as its length (2.0–2.1 vs. 1.6–1.7 cm), the sepals ecarinate vs. carinate, the style length (7.5–8 vs. 12–14 mm), and the flower colour (red vs. white).
Etymology:— The specific epithet honors Ana Rosa López-Ferrari, Mexican botanist who has made significant contributions to the knowledge of the monocot flora of Mexico and a beloved professor of the first two authors.
Distribution and habitat:— The new taxon is only known from the state of Oaxaca, in the municipality of San Juan Colorado (Fig. 3), where it grows on cliffs or rocky slopes in pine-oak forests, between 850–900 m a.s.l. elevation.
María Isabel Mejía-Marín, Edith González Rocha and Adolfo Espejo-Serna. 2020. Pitcairnia anarosae (Bromeliaceae; Pitcairnioideae) A New Species from the State of Oaxaca, México. Phytotaxa. 429(2); 85–90. DOI: 10.11646/phytotaxa.429.2.1
