Phyllanthus (sect. Loxopodium) G. L. Webster 1955

Key for identification of Phyllanthus sect. Loxopodium species occurring in Brazil 1. Stems winged, flattened or angled in cross section; leaves chartaceous............................................................................................2 - Stems cylindrical in cross section; leaves thinly membranaceous.....................................................................................................4 2. Stems up to 13 cm tall, winged, hispidulous; leaves 3���6 �� 2.9���3 mm, indumented, ciliate at margin; pistillate disk patelliform; flowers on both sexes 5 and 6-merous on the same plant.............................................................................. Phyllanthus pterocaulis - Stems (15) 19���50 cm tall; subcylindrical, angled or flattened, glabrous; leaves 5���15 �� 3���6 mm glabrous, non-ciliate at margin; pistillate disk anular or segmented; flowers on both sexes 5 or 6-merous on the same plant............................................................3 3. Plants dioecious; branches flattened; stipules hastate; cymules bisexual; stamens united; pistillate disk entire; capsules 2���2.1 mm long; seeds verruculose..................................................................................................................................... Phyllanthus avicularis - Plants monoecious; branches subcylindrical; stipules oval-triangular; cymules unisexual; stamens free; pistillate disk 5 or 6 segmented; capsules 3���3.1 mm long; seeds smooth.............................................................................. Phyllanthus hyssopifolioides 4. Leaves oblong-obovate, obovate or elliptic-obovate; stipules 0.8���12 mm long; segments of the staminate disk cuneate or rounded; pistillate sepals 1���1.2 mm long, linear-spathulate...................................................... Phyllanthus caroliniensis subsp. caroliniensis - Leaves elliptic; stipules 1.5���2 mm long; segments of the staminate disk oval or elliptic; pistillate sepals 0.7���0.9 mm long, oblong or spathulate.................................................................................................................... Phyllanthus caroliniensis subsp. guianensis
Published as part of Silva, Marcos Jos�� Da, Alonso, Alexandre Ant��nio & Santos, Igor Soares Dos, 2022, A new Critically Endangered species of stone breaker (Phyllanthus, Phyllanthaceae) from Central Brazil, with notes on its leaf and stem anatomy, pp. 53-64 in Phytotaxa 530 (1) on page 58, DOI: 10.11646/phytotaxa.530.1.4, http://zenodo.org/record/5823919