Lophogyne aeruginosa (P. Royen) C.T. Philbrick & C.P. Bove, 2023

Bedoya, Ana M. & Pérez, Álvaro J., 2023, New records of riverweeds (Podostemaceae) from the tropical Andes (Ecuador and Colombia): getting our feet wet to bypass collection bias in Neotropical rivers, Phytotaxa 585 (4), pp. 274-280 : 278

2. Lophogyne aeruginosa (P. Royen) C.T. Philbrick & C.P. Bove , comb. nov.

Phytotaxa 400: 83. 2019.

Basionym: Marathrum aeruginosum. P. Royen , Mededeelingen van het Botanisch Museum en Herbarium van de Rijks Universiteit te Utrecht 107: 132, tab. 8. figs. 1–2. 1951. TYPE:— Venezuela, Territorio Federal Amazonas, Orinoco River, at Raudal Santa Barbara, between Tamatama and San Fernando de Atabapo, altitude 100 m s.n.m., 7 September 1944 (fl,fr), J.A. Steyermark 58438 (holotype: F-1255237)

= Apinagia penicillata P. Royen, Mededeelingen van het Botanisch Museum en Herbarium van de Rijks Universiteit te Utrecht 107: 66–67, tab. 4, figs. 11–16. 1951. Basionym: Oenone penicillata P. Royen ex Maguire. Bulletin of the Torrey Botanical Club 75(4) 382–383. 1948. TYPE: SURINAME. Saramacca River , 11 October 1944 , B. Maguire 24927 (holotype: NY-387822; isotypes: BR, F, GH,K449051, P-167927, U not seen, US-1950184).

Notes:—The voucher specimens here identified as Lophogyne cf. aeruginosa have prostrate stems, solitary flowers (each subtended by a spathella), 2 stamens that arise on one side of the ovary, absence of a gynophore, non-cristate stigmas, and 6 winged ribs in the fruits visible when the capsules are dry; all defining traits of L. aeruginosa ( Figure 1a ) (Bove et al. 2011). Characteristics of the species not visible in the material collected include opposite shoots along a branched, compressed, irregular base 2–10 mm diameter; leaves repeatedly forked or cuneate with forked lobes apically, 1–5 cm long ( Berry 2004; Bove et al. 2020).

Figures

FIGURE 1. Podostemaceae recorded in fast-flowing aquatic ecosystems in Andean rivers of Ecuador and Colombia. a) Lophogyne cf. aeruginosa collected in Saloya River in Ecuador. The habit, prostrate stem, flowers each subtended by a spathella, stamens (two) on one side of ovary, lack of andropodium, and capsular fruits are shown. b) Tristicha trifaria collected in Ancho River in Colombia (top), Arenal River in Colombia (bottom left), and in Caoni River, Ecuador (bottom center and bottom right). The habit, tristichous leaves (photosynthetic shootlets or ramuli), stigmas (three), bracts (two) enclosing the flower before anthesis, the single stamen in a flower, and capsular fruits are shown. Information on the specific localities is in Table 1.