A New Species of Calycolpus (Myrtaceae) from the Campos Rupestres, Minas Gerais, Brazil Leslie R. Landrum Department of Botany, Arizona State University, Tempe, Arizona 85287-1601, U.S.A. Abstract. Calycolpus australis (Myrtaceae) of wide, 1.2—3 times as long as wide; apex acute or Minas Gerais, Brazil, is described as a new species. acuminate to rounded, sometimes cuspidate; base It is perhaps most similar to C. alternifolius but rounded to acute; petiole weakly channeled or flat, differs in various floral characters. This new species 1-2 mm long, 1—1.5 mm thick, tomentose to gla¬ extends the range of the genus six degrees of lati¬ brous; midvein impressed above, prominent below; tude farther south. lateral and marginal veins indistinct; blades cori¬ aceous, drying dark olive-green to reddish brown, Calycolpus is a genus of ca. 10 species ranging with many minute glands visible above; peduncles from Central America to Brazil with the greatest 1.5—3 cm long, 1.5—2 mm wide at apex, solitary, diversity in northeastern South America, especially thinly pubescent; bracteoles apparently caducous in the Guyana Highlands (McVaugh, 1969). It is early, only one seen, perhaps not typical, ca. 6 mm closely related to Psidium, but can be distinguished long, ca. 1 mm wide; calyx lobes two-parted, the from that and other related genera by floral and base an extension of the hypanthium, ca. 3 mm seed coat characters (Landrum & Sharp, 1989). Re¬ long, ca. 5—6 mm wide, rectangular, puberulent cently a new species has come to my attention from within and without, slightly concave within, fused the “campos rupestres” of Minas Gerais of Brazil along the margins with the adjacent bases for about that extends the southern range of Calycolpus near¬ Vi of length, the distal portion of calyx lobe (ap¬ ly six degrees of latitude farther south. pendage) leafy, oblong-triangular, glabrous, 6-11 mm long, ca. 4—6 mm wide, erect or reflexed, Calycolpus australis Landrum, sp. nov. TYPE: sparsely to densely pubescent beneath, subglabrous Brazil. Minas Gerais: Itambe do Mato Dentro, to pubescent above; petals obovate, concave, ca. estrada para Serra Cabega de Boi, 5 km de 1.5 cm long, ca. 1.2 cm wide; hypanthium camp- Itambe, 13 Jan. 1982 (fl), A. Hensold, M. T. anulate, 5—6 mm long, densely pubescent, tearing Rodrigues, N. L. Menezes & M. L. Kawasaki ca. 1 mm between calyx lobe bases at anthesis; disk CFCR 2836 (holotype, SPF 22316; isotypes, ca. 7 mm across, the staminal ring puberulent, ca. ASU, UB). Figure 1. 3 mm wide; stamens 250—300, ca. 10 mm long; anthers 1.3 mm long, with 7—14 glands in connec¬ C. alternifolio (Gleason) Landrum primo adspectu sim- illima, sed flores multi grandiores. tive; style 11 mm long; ovary 3-4-locular; ovules Frutex circa 2-metralis; pili albi vel luteoli, simplices; 9—14 per locule, the placenta an oblong pad, some¬ ramuli juventute breviter tomentosi; folia 1.7-5.3 cm lon- times slightly raised; fruit subglobose, about 1 cm ga, 1.1—2.5 cm lata, 1.2—3-plo longiora quam latiora; apex diam., dark purple beneath hairs; seeds apparently acutus vel acuminatus vel rotundatus nonnunquam cus- pidatus; basis rotundata vel acuta: laminae coriaceae, in few, ca. 2.5—3 mm long, the seed coat lustrous, ca. sicco atrovirideo-olivaceae vel atrorufo-brunneae; hypan- 1 cell thick across distal wall, the cells nearly iso- thium campanulatum, 5-6 mm longum, dense puberulum; diametric. stylus circa 11 mm longus, glaber; stamina 250—300, circa 10 mm longa, antheris circa 1.3 mm longis, connectivum Calycolpus australis is most similar to C. alter¬ 7— 14-glandulis; ovarium 3—4-loculare, loculis 9—14-ovu- nifolius. The differences are summarized in the key latis. below. Shrub to ca. 2 m high, the young growth and la. Closed flower bud ca. 7 mm long; disk 2—4 mm lower leaf surface densely short-tomentose; hairs across; calyx lobes triangular, not two-parted, 3— simple, whitish or yellowish, up to ca. 1 mm long, 5 mm long; petals 8—9 mm long; stamens 38—70, often curly; young twigs shortly tomentose, some¬ 3—5 mm long; style ca. 5 mm .... C. alternifolius times losing most hairs, then reddish brown, some¬ lb. Closed flower bud ca. 15 mm long; disk ca. 7 mm across; calyx lobes two-parted (see descrip¬ times obscurely 4-winged, the bark of older twigs tion), tile distal leafy portion 6—11 mm long; pet¬ becoming rough, gray; leaves elliptic, ovate, lan¬ als ca. 15 mm long; stamens 250—300, ca. 10 ceolate, or obovate, 1.7—5.3 cm long, 1.1-2.5 cm mm long; style ca. 11 mm long.C. australis Novon 8: 244-246. 1998. Volume 8, Number 3 Landrum 245 1998 Calycolpus australis from Brazil Figure I. Calycolpus australis Landrum. —A. Leaf from below. —If. Flower bud showing calyx lobes with clasping concave base and leafy distal portion (appendage). —C. Petal showing inner surface. —1). Two anthers, one showing glands in the connective. —L. flower after anthesis showing calyx lobes with pubescent base and glabrous appendage. —F. Seed in section and a side view. A-K drawn from Hensold el al. CFCR2836 (SPF 22316); F drawn from Kawasaki et al. 870. 246 Novon Calycolpus australis forms a morphological link Mato Dentro, 5 km de Itambe, estrada para Serra Cabe^a de Boi, depois da praia Canta Galo, 12 Oct. 1995 (fl), M. between C. altemifolius, a somewhal unusual spe¬ L. Kawasaki L. R. Landrum S. S. Landrum 870 (fr), cies in the genus, and the more typical species, C. 869, 871. 872, & 872 (young fr) (all ASU, SP). goetheanus (DC.) 0. Berg, for instance. Its closest geographic relative is C. legrandii Mattos of Bahia Acknowledgments. I am grateful to M. Sobral and Sergipe. Calycolpus australis grows in very for bringing this new species to my attention. I rocky soil that appears to he quite sterile. The gen¬ thank M. L. Kawasaki for helping to locate and eral vegetation is a sparse growth of shrubs. Caly¬ collect specimens in the field and for a careful re¬ colpus legrandii grows in sandy “restinga” habitats, view of this manuscript. Fieldwork in Brazil was and C. altemifolius on rocky tepui summits. Per¬ made possible by a Fulbright American Republics haps species of Calycolpus are best able to compete grant. Figure 1 was drawn by Bobbi Angell. on nutrient-poor substrates. Calycolpus australis is known from a single locality and thus may be quite Literature Cited restricted in distribution. Cmdrum. L. R. & W. P. Shaqi. 1989. Seed coat characters of some American Myrtinae (Myrtaceae): Psidium and Paratypes. BRAZIL. Minas Gerais: Itambe do Mato related genera. Syst. Bot. 14: 370-376. Dentro, estrada para a Serra da Cabeya de Boi, ca. 500- McVaugh, R. 1969. Myrtaceae. In: The botany of the Gua- 800 in ap6s o Canta Galo, campo rupestre, 9 Aug. 1992 yana Highland—Pt. 8. Mem. New York Bot. Card. (fl), J. R. Slehmann & M. Sobral I III (ASU); Itambe do 18(2): 55-286.