Two new species of Pavonia section Lebretonia subsection Hastifoliae (Malvaceae: Malvoideae) from southern Brazil
Grings, Martin
Boldrini, Ilsi Iob
Phytotaxa
2012
2012-01-01
39
38
46
Grings & Boldrini.
Grings & Boldrini.
2012
[151,676,151,180]
Magnoliopsida
Malvaceae
Pavonia
Animalia
Malvales
6
44
Tracheophyta
species
exasperata
sp. nov.
( Figure 2& 3 E–I) Affinis Pavoniae friesii, sed ab ea mericarpiis majoribus, apiculatis et 2 aut 3-tuberculiis lateralibus acutis ambobus lateribus nervo medio, foliis basilaribus interdum lobatis differt. Type:— BRAZIL. Rio Grande do Sul: near “Pedra do Segredo”, 26 abr. 2009, M. Grings& P. Brack 659( holotypeICN!, isotypes CTES!, NY!). Subshrubsup to 0.8 mtall; stems covered with stellate trichomes, more dense in younger stems; sometimes with glandular trichomes, more dense in younger stems. Leaf bladessubtriangular, triangular, ovate-triangular or suborbicular, sometimes with basal leaves slightly 3-5 lobed, 1.5– 6.5 × 0.8–3.9 cm, sagittate, hastate or subcordate, apex acute or subobtuse, margin crenate-serrate, ciliate, 5– 7-nerved, adaxial surface with sparse stellate trichomes, with sparse simple trichomes, seldom with sparse glandular trichomes, usually in young leaf blades, abaxial surface hoary stellate, usually with a tuft of setose trichomes in the base; petioles 0.8–3.5 cmlong, indumentum similar to that of the stems and usually with a tuft of setose trichomes in the apex; stipules subulate 2–6 mmlong, with short stellate trichomes and sometimes with setose trichomes in the apex. Flowerssolitary in the leaf axils, peduncle 1.0– 3.6 cmlong, articulated 3–6 mmbeneath the epicalyx, indumentum similar to that of the stems and usually with sparse setose trichomes, more dense in the apex; epicalyx bracts 5, lanceolate or narrowly elliptic, somewhat more narrow in the base, 7–11 × 1–2(–3) mm, stellate-tomentose, sometimes with setose trichomes in the base; calyx 9–10 mmlong, with more dense and larger stellate trichomes on the nerves; corolla white to pale-rose, petals 2.4–3.2 × 2.4–3.0 cm, with wine-red veins and claw; staminal column 7–10 mmlong; free parts of the stamens 2–4 mm; styles (1–) 3–4 mmlonger than the staminal column. Mericarps4–6 × 3–4 mm, sparsely pubescent, apiculate, prominently carinate, median nerve compressed and with rugosities, tuberculate, with two or three acute and prominent tubercles on each side. Seedssmooth with a tuft of trichomes at opposite ends of the hilum.
Distribution:— Brazil, occurring in the Pampa biome ( IBGE 2004) only in Rio Grande do Sul state( Figure 4). Phenology:—Flowering specimens have been collected from December to May. This species has cleistogamous flowers, observed in the beginning of November, fruiting from November to May. Habitat:—Forest edges, scrub and rocky grasslands.
Etymology:—From the Latin “ exasperatus”, meaning rugose, but with prominent tips, referring to the lateral acute tubercles of its mericarps. Additional specimens examined ( paratypes):— BRAZIL. Rio Grande do Sul: Bagé, BR153, near the limit with Caçapava do Sul, S 30º52'37.3" W 53º36'48.7", 01 November 2009, M. Grings& C. Buzzato792( ICN), property of Telmo Dias Dutra, 15 January 1992, Girardi-Deiro& Gonçalves825 ( HAS); Caçapava do Sul, BR 290 Km313, 12 December 2009, M. Grings& R. Paniz844( ICN), 07 December 1978, A. Krapovickasy C. L. Cristóbal34213( CTES, ICN), Minas do Camaquá, 06 December 1978, A. Krapovickasy C. L. Cristóbal34196( CTES, ICN), Guaritas, 12 October 1985, D. B. Falkenberg2748( FLOR), Passodos Enforcados, S 30º50'39.2" W 053º36'27.6", 03 November 2010, M. Grings& P. J. Silva Filho1114( ICN); Lavras do Sul, Rincão do Inferno, Cabanha Macanudo, S 30º51'38.2" W 53º42'29.7", 06 December 2009, M. Grings, R. Paniz& R. Both842( ICN), s.l., 10 April 2008, I. I. Boldrini, R. Trevisan& A. Schneider1498( ICN); Santana da Boa Vista, Faz. Passo da Chácara, 29 March 1975, A. Sehnem14597( PACA). Pavonia exasperatais similar to P. friesii Krapovickas (1977: 318)and P. orientalis Krapovickas (1977: 320)due to its similar narrow epicalyx bracts, usually sagittate leaf blades, and white or pale pink petals with basally vinaceous center and veins. However, P. exasperatadiffers from these species mainly in its larger mericarps with two to three lateral tubercles at each side of the median nerve. In addition, this species may present slightly lobate leaf blades, especially in basal leaves.
3128910312
Bage, BR
Brazil
Rio Grande do Sul
6
44
2
Rio Grande do Sul
paratype
3128910310
2009-11-01
ICN
M. Grings & C. Buzzato
Brazil
-30.877028
Cacapava do Sul
1
-53.613525
6
44
1
Cacapava do Sul
3128910313
[236,1273,1386,1412]
1992-01-15
HAS
Girardi-Deiro & Goncalves
Brazil
Telmo Dias Dutra
6
44
1
3128910319
2009-12-12
ICN
M. Grings & R. Paniz
Brazil
Km
6
44
1
Cacapava do Sul
3128910318
1978-12-07
CTES, ICN
Krapovickas & C. L. Cristobal
Brazil
6
44
1
3128910305
1978-12-06
CTES, ICN
Krapovickas & C. L. Cristobal
Brazil
Minas do Camaqua
6
44
1
3128910328
[595,1306,1498,1524]
1985-10-12
FLOR
D. B. Falkenberg
Brazil
Guaritas
6
44
1
3128910324
2010-11-03
ICN
M. Grings & P. J. Silva Filho
Brazil
-30.844223
Enforcados
1
-53.607666
Passo
6
44
1
3128910315
2997653238
2009-12-06
ICN
M. Grings & R. Paniz & Both
Brazil
https://www.gbif.org/occurrence/2997653238
-30.860611
Cabanha Macanudo
1
-53.708252
Rincao do Inferno
6
44
1
Lavras do Sul
3128910309
2008-04-10
ICN
Boldrini & Trevisan & A. Schneider
Brazil
6
44
1
3128910320
[236,1281,1648,1674]
1975-03-29
PACA
A. Sehnem
Brazil
Faz. Passo da Chacara
Santana da Boa Vista
6
44
1