Brayopsis limensis Al-Shehbaz

Al-Shehbaz, Ihsan A., Cano, Asunción, Trinidad, Huber, Gonzáles, Paúl & Huamán, Elluz, 2018, Two new Peruvian species of Brayopsis (Brassicaceae; Cruciferae), and a key to the species, Phytotaxa 383 (1), pp. 111-111 : 111

publication ID

https://doi.org/10.11646/phytotaxa.383.1.7

DOI

https://doi.org/10.5281/zenodo.13725168

persistent identifier

https://treatment.plazi.org/id/497D2D35-FFC9-1F60-3AE2-FF14FC42C932

treatment provided by

Felipe

scientific name

Brayopsis limensis Al-Shehbaz
status

sp. nov.

Brayopsis limensis Al-Shehbaz View in CoL , Trinidad, A. Cano & P. Gonzáles, sp. nov.

Diagnosis:— Brayopsis limensis is easily distinguished from the other species of the genus by being densely pulvinate and having glabrous fruit and leaves adaxially with trichome 1.2 − 2.1 mm long.

Type: — PERU. Lima: Prov. Oyón, Abra Macaulo, arriba de laguna Surasaca , 10°31 ʹ 07 ʺ− 10°31 ʹ 10 ʺ S, 76°48 ʹ 23 ʺ− 76°48 ʹ 03 ʺ W ( UTM: 302312 − 302909, 8836191 − 8836095, zone 18), 4750 − 4800 m, 3 December 2017, A. Cano, H. Trinidad, P. Gonzáles & S. Riva 22620 ( holotype, USM-304585; isotype, MO-6835842). Figures 1 View FIGURE 1 , 2 View FIGURE 2 GoogleMaps .

Description: —Herbs perennial, densely pulvinate; caudex woody, much branched, covered with petioles of previous years. Basal leaves densely rosulate; petiole persistent for many years, 3 − 7 mm long, not ciliate, indurate and becoming stramineous with age, ca. 1 mm wide at base, subequal to slightly longer and distinctly thicker than blade; blade narrowly ovate to oblanceolate, 3 − 5 × 1.2 − 2 mm, glabrous abaxially, sparsely to densely pubescent adaxially with straight or rarely slightly crisped trichomes (1.2 −) 1.5 − 2.1 mm long and as long as or longer than blade width, margin entire, apex obtuse. Fruiting pedicels 6 − 10( − 13) mm long, solitary from basal rosette, thick, glabrous. Sepals ovate, erect, 2 − 2.5 mm long, purplish, glabrous, caducous; petals white, oblanceolate, 2.5 − 3 × 1 − 1.5 mm, caducous, undifferentiated into blade and claw, apex obtuse; filaments 2 − 2.3 mm long, caducous; anthers ovate, 0.5 − 0.6 mm long; ovules 12 − 14 per ovary. Fruit linear, terete, straight, 6 − 10 × 1 − 1.2 mm; valves glabrous, midvein distinct; septum complete; gynophore obsolete; style 0.2 − 0.7 mm long. Seeds oblong, 0.8 − 1.2 × 0.5 − 0.6 mm.

Phenology: —Flowering in December and fruiting in March to July.

Habitat: — Brayopsis limensis grows on crioturbed soil of rocky slopes at elevations of 4100 − 4800 m.

Etymology: —The species epithet limensis is named after the Peruvian department Lima.

Distribution: —Endemic to Peru and known from Ancash, Lima, and Apurímac departments.

Discussion: — Brayopsis limensis is closely related to the Peruvian-endemic B. chacasensis Al-Shehbaz & A. Cano , a narrow endemic known thus far only from the type gathering from Depto. Ancash, as well as to B. calycina (Desv.) Gilg & Muschl. , the most widespread species in the genus where it grows in Argentina ( Catamarca, Salta, Tucumán), Bolivia ( La Paz, Potosí, Tarija), and Peru ( Ancash, Arequipa, Ayacucho, Cajamarca, Cuzco, Huancavelica, Huancayo, Lima, Moquegua, Puno, Tacna). It resembles B. chacasensis in being densely pulvinate with indurated and persistent petioles, smaller flowers, fruit, and seed of about the same size, short fruiting pedicels hardly exceeding 1 cm in length, and the number of ovules per ovary. From this species, the novelty differs by having leaf blades densely pubescent adaxially with trichomes (1.2 −) 1.5 − 2.1 mm long and as long or longer than blade width, caducous floral parts that fall off shortly after anthesis, complete septum, and non-ciliate petioles. By contrast, B. chacasensis has glabrous leaf blade terminated with 1 or 2 trichomes, persistent floral parts that remain until fruit dehiscence, perforated septum, and ciliate petioles. From B. calycina , B. limensis differs by being densely pulvinate (vs. not pulvinate) with shorter fruiting pedicels 0.6 − 1( − 1.3) (vs. (1.5 −)2 − 4.2( − 5.5) cm long, fewer (12 − 14 vs. (16 −)20 − 36) ovules per ovary, smaller seeds (0.8 − 0.9 × ca. 0.5 vs. 1.1 − 1.4( − 1.7) × 0.7 − 0.9 mm), and leaves adaxially pubescent with usually straight trichomes (1.2 −) 1.5 − 2.1 mm long (vs. glabrous or sparsely pubescent with crisped trichomes to 1 mm long.

Additional specimens examined ( paratypes): — PERU. Ancash: Prov. Huari, Huascaran National Park, 3 − 4 km below Cahuish tunnel, 77°14 ′ W, 9°41 ′ S, 10 July 1985, Smith & Buddensiek 11116 (MO). Apurimac: Cotabambas, Challhuahuaco, Cerro Ccomerqaqa, 76°51 ʹ 46 ʺ− 76°49 ʹ 31 ʺ W, 4100 − 4150 m, 3 March 2013, Cano & Valencia 21455 (MO, USM). Lima: Oyón, Abra Macaulo, arriba de laguna Surasaca, 4750 − 4800 m, 10°31 ʹ 07 ʺ− 10°31 ʹ 10 ʺ S, 76°48 ʹ 23 ʺ− 76°48 ʹ 03 ʺ W, December 2017, Cano et al. 22622 (MO, USM).

A

Harvard University - Arnold Arboretum

H

University of Helsinki

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

S

Department of Botany, Swedish Museum of Natural History

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