Phyllanthopsis
Kew Bull. 63: 47. 2008.
Shrubs, monoecious or dioecious, glabrous or hairy, hairs simple; branching not phyllanthoid. Leaves persistent, alternate, simple, all well developed; stipules persistent; blade margins entire. Inflorescences unisexual, fascicles or flowers solitary. Pedicels present. Staminate flowers: sepals 5, distinct; petals 5; nectary extrastaminal, annular, crenate; stamens 5; filaments distinct; connectives not extending beyond anthers; pistillode of 3 distinct segments. Pistillate flowers: sepals persistent, 5, distinct; petals 5; nectary annular, crenate; pistil 3(–4)-carpellate; styles 3(–4), distinct, usually 2-fid to 1/2 length, very rarely 2-fid to base. Fruits capsules. Seeds 2 per locule, rounded-trigonous; seed coat dry, smooth; caruncle usually absent, sometimes present. x = 13.
Distribution
s United States, n Mexico.
Discussion
Species 2 (2 in the flora).
Members of Phyllanthopsis resemble Andrachne and Leptopus Decaisne due to their habits, petals, and discs, and generally have been included in one or the other of these genera, neither of which (in their currently accepted senses) occurs in the flora area. Phyllanthopsis was given generic status in 2008 after molecular phylogenetic studies revealed it to be an independent North American lineage closely related to the Asian Leptopus and Actephila Blume (M. S. Vorontsova et al. 2007; Vorontsova and P. Hoffmann 2008).
Lower Taxa
Key
| 1 | Leaf blades 4–10 × 3–6 mm, secondary vein pairs 1–3, obscure; stems highly branched, branches spreading, longest leafy branchlets to 10 cm. | Phyllanthopsis arida |
| 1 | Leaf blades 7–25 × 6–20 mm, secondary vein pairs 4–7, clearly visible; stems sparsely branched, branches ascending, longest leafy branchlets to 30(–55) cm. | Phyllanthopsis phyllanthoides |