Monographs Details:
Authority:

Renner, Susanne S. & Hausner, Gerlinde. 2005. Siparunaceae. Fl. Neotrop. Monogr. 95: 1--247 pp. (Published by NYBG Press)
Family:

Monimiaceae
Synonyms:

Tetratome lepidota Poepp. & Endl., Siparuna sprucei A.DC., Siparuna amazonica Mart. ex A.DC., Siparuna espinhacensis Jangoux
Description:

Species Description - Monoecious treelet or tree, 3-12(-25) m tall, reaching a dbh of 20 cm; young branchlets distinctly flattened below the nodes (Fig. 2B), with few appressed stellate hairs. Leaves opposite; petioles 0.8-1.5 cm long; lamina drying grayish brown, brown, or greenish brown, chartaceous, oblong to elliptic, 11-18 X 3.3-7 cm, the base obtuse to acute, the apex acuminate, the tip 1-2 cm long, with few stellate hairs, especially on the midrib, glabrescent, with 912 pairs of secondary veins, these flat on both surfaces, the margin entire. Cymes 1-1.5 cm long (to 3 cm long in fruit), covered with stellate hairs, with 515 flowers. Fresh flowers greenish yellow; male floral cup obconical, 2.6-2.8 mm in diam., 2.4-3.5 mm high, the indumentum as on the cymes; tepals 4(-5), broadly triangular, 2-3.5 mm long, adaxially densely tomentose like the floral roof; stamens 8-14; female floral cup of the same size and shape as the male except the floral roof acutely conical; styles 5-10, fused and forming a column that emerges from the floral roof. Fruiting receptacle globose and crowned by the persistent tepals, 1-1.5 cm in diam. (fresh to 2 cm diam.), when fresh and mature yellow or green tinged red to completely red, smelling strongly of lemon, bursting open irregularly to expose the drupelets; drupelets 8-10, lacking a stylar aril.

Discussion:

Siparuna poeppigii is similar to S. guianensis but differs in having distinctly developed triangular tepals (Figs. 2B, 22B). In the field, these flowers look very different from “typical” Siparuna, and the species is sometimes mistaken for a Mollinedia. Indeed, it was originally described in the genus Tetratome, a synonym of Mollinedia.

Jacques Jangoux observed a treelet of S. poeppigii, that had been chopped off, with alternate leaves on the new shoots. As the new shoots grew, leaf spacing changed such that leaves eventually again were subopposite or opposite (personal communication, March 2001; documenting voucher deposited at MG).
Distribution:

Caquetá Colombia South America| Suriname South America| French Guiana South America| Orellana Ecuador South America| Huánuco Peru South America| Loreto Peru South America| San Martín Peru South America| Ucayali Peru South America| Amapá Brazil South America| Amazonas Brazil South America| Mato Grosso Brazil South America| Minas Gerais Brazil South America| Pará Brazil South America|

Common Names:

picho huayo