Hippeastrum diniz-cruziae J.Dutilh & Semir, 2013

Oliveira, Renata Souza De, Semir, João & Dutilh, Julie Henriette Antoinette, 2013, Four new endemic species of Hippeastrum (Amaryllidaceae) from Serra da Canastra, Minas Gerais State, Brazil, Phytotaxa 145 (1), pp. 38-46 : 41

Hippeastrum diniz-cruziae J.Dutilh & Semir , sp. nov. ( Fig. 1H–N & Fig. 3I–L )

Species nova H. cipoanum affinis , sed folia lorata (non linearia) et saepe fauce macula vinacea differt.

Type: — BRAZIL. Minas Gerais: Delfinópolis, estrada para Casinha Branca, Sete Cidades , 20 o 21’64”S, 46 o 44’83”W, campo rupestre com cerrado rupestre, 8 October 2002, R. L . Volpi et al. 181 (holotype HUFU!, isotype SPF!, RB!) .

Perennial herbs 40–60 cm tall. Subterranean bulb among rocks, 3–4 cm diam., brown; neck formed by sheath in the base of leaves 1.8–2.5 cm long. Leaves lorate, flat, up to 20 cm long during flowering, 1.5–2 cm wide, margins cartilaginous, apex obtuse. Inflorescence 2-flowered; scape cylindrical, 30–48.6 cm tall, 0.6–0.8 cm wide in distal portion; bracts free, 2.5–3 cm long, reddish green in bud, turning papery. Pedicel 3.5–4.5 cm long, pinkish-green. Perigone funnel-shaped, 4.8–8.1 × 4.4–7.8 cm. Hypanthium tube 0.9–1.8 cm long, 0.4– 0.5 cm diam. at ovary, 0.8–0.9 cm diam. at throat, dark red. Paraperigone of bristles, whitish. Tepals in free portion nasturtium red, internally with yellowish-white strip at the throat, frequently with a wine colored stain; sepals obovate, upper 3.9–6.3 × 1.8–2.5 cm, lateral 3.8–6.2 × 1.6–2.6 cm, apex acute; petals narrowly obovate, lateral 3.7–6.1 × 1.5–2.7 cm, lower 3.6–6 × 1.3–1.8 cm, apex acute. Staminal filaments declinateascending, free portion red with yellowish base, in four lengths: lateral episepal 2.1–3.4 cm long; upper episepal 2.3–3.5 cm long; lower epipetal 2.6–4.1 cm long; lateral epipetal 2.7–4.3 cm long. Anthers oblong, 0.8–1.1 cm long before anthesis, cream colored, with yellow pollen. Style declinate-ascending, 4.4–7.7 cm long, red with yellowish base; stigma trilobed to shortly trifid, lobes 0.1–0.2 cm long, white. Ovary obovate, 0.6–0.9 × 0.4–0.5 cm, brown, about 32 ovules per locule. Capsule globose-compressed about 1.5 × 2.5 cm. Seeds flattened half-discoid, about 0.8 cm diam, black. Chromosome number 2n = 44 (verified in one individual).

Distribution and ecology: — Hippeastrum diniz-cruziae is restricted to the surroundings of the Serra da Canastra, mainly in the National Park, occurring in “campo rupestre” in soil among rock outcrops, usually in small groups of individuals. Most plants flower in November.

Etymology: —The epithet “ diniz-cruziae ” was chosen in posthumous honor Dr. Neuza Diniz da Cruz, cytogenetic researcher at Agronomic Institute (IAC) and University of Campinas and masters’ advisor of Julie Dutilh.

Additional specimens examined (paratypes):— BRAZIL. Minas Gerais: Delfinópolis, trilha escada de Pedras, Fazenda José Antunes, 20 o 26’04”S, 46 o 38’72”W, 11 October 2002, R . Romero et al. 6413 ( HUFU!); Idem , 26 November 2003, J. N . Nakajima et al. 3717 ( HUFU!); Idem , cerrado rupestre, 5 December 2002, R. L . Volpi, et al. 389 ( HUFU!); São Roque de Minas, Parque Nacional da Serra da Canastra , campo rupestre, 20 November 2002, R. A . Pacheco et al. 359 ( HUFU!); estrada para Sacramento , 3 km da sede administrativa, 20 November 1996, R . Romero & J. N . Nakajima 3789 ( HUFU!, UEC!); estrada para Sacramento, ca. 4 Km do Curral de Pedras , campo limpo alterado, 10 December 1994, R . Romero & J. N . Nakajima 1583 ( HUFU!); Curral de Pedras , nas fendas de pedras, 20 o 13'46.261"S, 46 o 26'44.905"W, 1 November 2009, R. S . Oliveira & R.P. Camargo 123 ( UEC!); morro próximo do alojamento, campo rupestre, 20 November 2002, H. R . Fleury- Silva et al. 247 ( HUFU!); idem, 20 November 2002, R . Romero et al. 6592 ( HUFU!); idem, campo limpo com afloramento rochoso, 20 November 2002, P. C . Duarte et al. 88 ( HUFU!) .

Taxonomic remarks: — Hippeastrum diniz-cruziae is a polyploid specie and its flowers are morphologically very similar to H. cipoanum . While H. cipoanum has linear leaves, H. diniz-cruzie differs by its lorate leaves, and frequently presents a wine colored stain at the base of tepals.

Figures

FIGURE 1. A–G. Hippeastrum canastrense (from Nakajima et al. 2812). A–B. Habit. A. Bulbs in reproductive phase. B. Bulb in vegetative phase. C. Longitudinal section in perigone, showing absence of paraperigone, staminal filaments and style position. D–G. Papillary region at the adaxial apex of tepals. D. Upper sepal. E. Lateral sepal. F. Lateral petal. G. Lower petal. H–N. Hippeastrum diniz-cruziae (from Romero & Nakajima 3789). H–I. Habit. H. Bulb in reproductive phase. I. Bulb in vegetative phase. J. Longitudinal section in hypanthium tube and throat region, showing paraperigone of bristles. K–N. Papillary region at the adaxial apex of tepals. K. Upper sepal. L. Lateral sepal. M. Lateral petal. N. Lower petal.

FIGURE 3. A–D. Hippeastrum canastrense. A. Flower in lateral view. B. Biflora inflorescence with a flower in front view. C. Uniflora inflorescence. D. Population in field, some months after fire. E–H. Hippeastrum roseoalbum. E. Biflora inflorescence. F. Close-up of throat region. G. Uniflora inflorescence with flower in lateral view. H. Flower in front view. I–L. Hippeastrum dinizcruziae. I. Habit. J. Biflora inflorescence, a flower in front view with a pillager insect. K. Close-up of throat region. L. Triflora inflorescence, with flowers in bud. M–O. Hippeastrum sanfranciscanum. M. Uniflora inflorescence with flower in lateral view. N. Flower in front view. O. Flower in lateral view. P. Hippeastrum glaucescens. Inflorescence with flowers in front and lateral view. (A– I, K, M–O photos by R. S. Oliveira; J, L by R. Mello-Silva; P by J. Dutilh).