Pariana Aublet (1775: 876)

Lopes-Neto, Raimundo Balieiro & Viana, Pedro Lage, 2022, Flora of the Serra do Cachimbo (Eastern Amazon, Brazil): Bambusoideae (Poaceae), including the description of two new species, Phytotaxa 550 (2), pp. 99-129 : 119

Pariana Aublet (1775: 876) .

TYPE:— Pariana campestris Aublet (1775: 876) .

Plants cespitose. Culms homomorphic or dimorphic, the flowering culm bladeless to leafy and similar to vegetative culms, erect, decumbent or prostrate, 0.3 to 1 m tall, infra- and supranodal bands of trichomes absent, unbranched, without thorns. Leaves not differentiated into culm leaves and foliage leaves. Leaf sheaths with fimbriae at the apex, translucent swelling present near the summit, outer ligule absent, blades ovate, elliptic or lanceolate, midnerve not prominent. Synflorescences terminal, spiciform, constituted by a series of whorls, connected by the rachis internodes, with each whorl formed by one female spikelet surrounded by five male spikelets; spikelets sessile (female spikelets) or with fused flat and indurate pedicels (male spikelets), unisexual, glumes 2, anthecium smooth. Fruit a basic caryopsis.

Pariana is an herbaceous bamboo genus with erect, decumbent or prostrate culms, these sometimes dimorphic; ovate, elliptic or lanceolate leaf blades; fimbriae and a translucent swelling present near the apex of the leaf sheath and are terminal and spiciform synflorescences, constituted by a series of whorls, each whorl formed by one female spikelet surrounded by five male spikelets, these with flat, indurate and fused pedicels. This is a neotropical genus with 28 described species ( Ferreira et al. 2019, Dias et al. 2021). In the Serra do Cachimbo, is represented by two species.

Identification key to the species of Pariana from the Serra do Cachimbo, Eastern Amazon, Brazil.

1. Leaf sheaths with auricles inconspicuous, fimbriae abundant, 10–18 per leaf, blades with L:W ratio = 1.1–2.1, abaxially shortly pilose, adaxially glabrous and apex acute ............................................................................................................ Pariana radiciflora

- Leaf sheaths with auricles distinctly developed, fimbriae sparse, 6–7 per leaf, blades L:W ratio = 2.9–4, glabrous on both surfaces and apex acuminate ............................................................................................................................................. Pariana zingiberina