Hippeastrum roseoalbum R.S.Oliveira & J.Dutilh, 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 : 41-44

Hippeastrum roseoalbum R.S.Oliveira & J.Dutilh , sp. nov. ( Fig. 2A–G & Fig. 3E–H )

Species nova H. cipoanum affinis , sed perigonium album roseum tinctum vel striatum (non rubrum), et folia teretiuscula (non plana) differt.

Type: — BRAZIL. Minas Gerais: Delfinópolis, Estrada para “Casinha Branca”, 20 o 26’04”S, 46 o 38’72”W, 29 November 2003, J. N . Nakajima et al. 3786 (holotype HUFU!, isotype SPF!, RB!) .

Perennial herbs, 18–27 cm tall. Subterranean bulb in sandy field, 1.5–2 cm diam., brown; neck formed by sheath in the base of leaves 2–2.2 cm long. Leaves linear, half-terete, up to 16 cm long during flowering, 0.1– 0.2 cm wide, margins rounded, apex acute. Inflorescence 1(–2) flowered; scape slightly laterally compressed, 9.5–15.2 cm tall, 0.2–0.4 cm wide in distal portion; bracts free, 2.4–3.7 cm long, reddish-green in bud, turning papery. Pedicel 1.7–3.5 cm long, pinkish-green. Perigone funnel-shaped, 4.6–6.1 × 4.5–6.5 cm. Hypanthium tube 0.5–0.8 cm long, 0.3–0.4 cm diam. at ovary, 0.6–0.9 cm diam. at throat, reddish. Paraperigone of fasciculate bristles, whitish. Tepals in free portion white, internally with a cream colored strip, often tinged of rose; sepals elliptic, upper 4.1–5.3 × 1.4–2.1 cm, lateral 4.1–5.3 × 1.2–2.1 cm, apex acute; petals narrowly obovate, lateral 4–5.1 × 1.1–2 cm, lower 3.9–5 × 0.9–1.3 cm, apex acute. Staminal filaments declinateascending, free portion white with greenish base, in four lengths: lateral episepal 1.2–2.1 cm long; upper episepal 1.7–2.2 cm long; lower epipetal 1.9–3 cm long; lateral epipetal 2.6–3.2 cm long. Anthers oblong, 1– 1.5 cm long before anthesis, cream colored, with yellow pollen. Style declinate-ascending, 3.4–5 cm long, white with greenish base; stigma trifid, lobes 0.2–0.3 cm long, white. Ovary obovate, 0.5–0.7 × 0.2–0.3 cm, brown, about 30 ovules per locule. Capsule and seeds not seem. Chromosome number 2n = 22.

Distribution and ecology: —Isolated populations of Hippeastrum roseoalbum occur at the Serra da Canastra National Park, near the Sacramento entrance; in Delfinópolis’s "campo rupestre", near populations of H. diniz-cruzie . Most plants flower in November.

Etymology: —The epithet “ roseoalbum ” is Latin to “white-rose” in reference to the color of the perigone, which differentiates it from H. cipoanum .

Additional specimens examined (paratypes): — BRAZIL. Minas Gerais: Delfinópolis, Fazenda José Antunes, trilha “ Escada de Pedras ”. 20 o 26’04”S, 46 o 38’72W, campo rupestre, 11 October 2002, R . Romero et al. 6424 ( HUFU!); trilha escada de pedras, 20 o 26’04”S, 46 o 38’72”W, 841 m, cerrado rupestre, 5 December 2002, R. L . Volpi et al. 412 ( HUFU!); São Roque de Minas, Parque Nacional da Serra da Canastra, estrada para a Serra da Chapada , campo limpo, solo pedregoso, 2 meses após queimada, 14 October 1997, R . Romero et al. 4582 ( HUFU!, UEC!); fazenda da Zagaia, campo limpo, 2 meses após queimada, solo pedrogoso, 25 September 1996, R . Romero & J. N . Nakajima 3708 ( HUFU!, UEC!). Sacramento, Parque Nacional da Serra da Canastra , campos próximos aos fragmentos de cerrado, 20 o 08'37.637"S, 46 o 54'6.977"W, 2 November 2009, R. S . Oliveira & R.P. Camargo 125 ( UEC!) .

Taxonomic remarks: — Hippeastrum roseoalbum is similar to H. cipoanum , differing by the tepal colors and by the leaf shape. The tepals of H. roseoalbum in free portion are white, often tinged with rose, internally with a cream colored strip, and the leaves are half-terete; in H. cipoanum the tepals are nasturtium red to entirely dark pink and the leaves are flat.

Hippeastrum sanfranciscanum J.Dutilh & R.S.Oliveira , sp. nov. ( Fig. 2H–M & Fig. 3M–O ) Species nova H. cipoanum affinis , sed tubi hypanthii longioris et folia teretiuscula (non plana) differt. Type: — Brazil. Minas Gerais: São Roque de Minas, Estrada São Roque de Minas –Sacramento, 1.5 km aquém do Curral

de Pedra, campo limpo do alto da chapada, com pequenos afloramentos rochosos, 20 o 13’11.7”S 46 o 28'14.3”W, elev.

1450 m, 30 October 2011, Y . Kavalciuki et al. 5 (holotype SPF!, isotypes HUFU!, K!, RB!) .

Perennial herbs, 28–31 cm tall. Subterranean bulb in sandy-rocky field, 1.8–2.6 cm diam., brown; neck formed by sheath in the base of leaves 1.5–3.6 cm long. Leaves linear, half-terete, up to 25 cm long during flowering, 0.2–0.4 cm wide, margins rounded, apex acute. Inflorescence 1(–3) flowered; scape slightly laterally compressed, 18.4–20 cm tall, 0.3–0.5 cm wide in distal portion; bracts free, 2.3–2.6 cm long, reddishgreen in bud, turning papery. Pedicel 1.9–2.8 cm long, pinkish-green. Perigone funnel-shaped, 6–8.3 × 5.2– 7.4 cm. Hypanthium tube 1.8–2.4 cm long, 0.3–0.5 cm diam. at ovary, 0.4–0.9 cm diam. at throat, dark red. Paraperigone of inconspicuous scales, flanking the base of the filaments. Tepals in free portion bright nasturtium red, internally with yellowish-white strip; sepals obovate, upper 4.2–5.9 × 1.1–2.3 cm, lateral 4– 5.9 × 0.9–2.1 cm, apex acute; petals narrowly obovate, lateral 4–5.9 × 0.9–1.8 cm, lower 3.8–5.9 × 0.8–1.6 cm, apex acute. Staminal filaments declinate-ascending, free portion red with yellowish base, in four lengths: lateral episepal 1.8–3 cm long; upper episepal 2.1–3.1 cm long; lower epipetal 2.1–3.3 cm long; lateral epipetal 2.4–3.4 cm long. Anthers oblong, 1–1.1 cm long before anthesis, cream colored, with yellow pollen. Style declinate-ascending, 5.1–8.3 cm long, red with yellowish base; stigma trifid, lobes 0.2–0.4 cm long, white. Ovary obovate, 0.5–0.7 × 0.3–0.5 cm, brown, 30–34 ovules per locule. Capsule globose-compressed about 0.9 × 1.5 cm. Seeds flattened, half-discoid, about 0.7 cm diam, black. Chromosome number 2n = 22.

Distribution and ecology: —Extensive populations of Hippeastrum sanfranciscanum are only known in the Serra da Canastra National Park, near the headwaters of the São Francisco River, in sandy-rocky fields of “campo rupestre”, among grasses and other herbs. Most plants with flowers in October/November.

Etymology:—The epithet “sanfrasciscanum” refers to the important Brazilian São Francisco River, which rises at Serra da Canastra.

Additional specimens examined (paratypes): — BRAZIL. Minas Gerais: São Roque de Minas, Parque Nacional da Serra da Canastra, campo limpo ao lado da estrada São Roque de Minas–Sacramento , ca. 10 km da portaria, 9 November 2002, A. F . Pontes et al. 556 ( SPF!); Chapadão do Diamante , final da estrada, campo limpo associado, em campo rupestre, 15 November 1997, J. N . Nakajima et al. 2839 ( HUFU!, UEC!); Córrego do Quilombo , Três Matinhas, campo limpo, solo pedregoso, 15 October 1997, J. N . Nakajima et al. 2868 ( HUFU!, UEC!); estrada São Roque de Minas – Sacramento, campo limpo após Curral de Pedras , 22 November 1998, M. A . Farinaccio et al. 202 ( SPF!, HRCB!); morro após a nascente do rio São Francisco , estrada para Sacramento, campo rupestre, 16 October 1994, R . Romero et al. 1298 ( HUFU!); nas proximidades da nascente do Rio São Francisco , próximo a estrada, em campo, 20°13’58.9”S, 46°29’39.9”W, 1401 m, 2 November 2009, R. S . Oliveira & R.P. Camargo 126 ( UEC!); estrada para cachoeira Casca D’Anta, parte de cima, 26 September 2002, R. A . Pacheco et al. 209 ( HUFU!) .

Taxonomic remarks: — Hippeastrum sanfranciscanum is similar to H. cipoanum , differing by its much longer hypanthium tube and half-terete leaves. Hippeastrum cipoanum presents flat leaves.

Hippeastrum kromerii ( Worsley 1939: 117) Meerow (1997: 17) was described from bulbs cultivated in England that were collected from “banks of upper river San Francisco, Minas Gerais”. The locality seems to refer to Serra da Canastra, but H. kromerii has no type designated, and some remarks suggest it is Hippeastrum glaucescens (Mart. ex Schultes & Schultes 1830: 813) Herbert (1837: 139) ( Fig. 3P ), which occurs in the area.

Identification key to Hippeastrum from Serra da Canastra, Minas Gerais State, Brazil

1. Leaves lorate and flat ................................................................................................................................................. 2.

- Leaves linear half-terete ............................................................................................................................................. 3.

2. Flowers nasturtium red, symmetric obovate lateral sepals ................................................. Hippeastrum diniz-cruziae

- Flowers pale green and pale red, with darker reticulation, asymmetric falcate lateral sepals ....................................... .............................................................................................................................................. Hippeastrum glaucescens

3. Flowers nasturtium red ................................................................................................ Hippeastrum sanfranciscanum

- Flowers white, or white tinged with rose ................................................................................................................... 4.

4. Hypanthium tube 0.5–0.8 cm long ....................................................................................... Hippeastrum roseoalbum

- Hypanthium tube 3–4.6 cm long........................................................................................... Hippeastrum canastrense

Figures

FIGURE 2. A–G. Hippeastrum roseoalbum (from Romero et al. 4582). A–B. Habit. A. Bulbs in reproductive phase. B. Bulb in vegetative phase. C. Longitudinal section in hypanthium tube and throat region, showing paraperigone of fasciculate bristles. D–G. Papillary region at the adaxial apex of tepals. D. Upper sepal. E. Lateral sepal. F. Lateral petal. G. Lower petal. H–M. Hippeastrum sanfranciscanum (from Nakajima et al. 2868). H–I. Habit. H. Bulbs in reproductive phase. I. Bulb in vegetative phase. J–M. Papillary region at the adaxial apex of tepals. J. Upper sepal. K. Lateral sepal. L. Lateral petal. M. 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).