A Revised Sectional Classification of Plukenetia L. (Euphorbiaceae, Acalyphoideae) with Four New Species from South America Author Cardinal-McTeague, Warren M. Research & Collections, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, Ontario, K 1 P 6 P 4, Canada & Current address: Institut de recherche en biologie végétale and Département de sciences biologiques, Université de Montréal, 4101 Sherbrooke Est, Montréal, Québec, H 1 X 2 B 2, Canada & Author for correspondence (warren. cardinal-mcteague @ umontreal. ca) warren.cardinal-mcteague@umontreal.ca Author Gillespie, Lynn J. Research & Collections, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, Ontario, K 1 P 6 P 4, Canada text Systematic Botany 2020 Basel, Switzerland 2020-08-11 45 3 507 536 https://doi.org/10.1600/036364420x15935294613572 journal article 310262 10.1600/036364420X15935294613572 7796dd75-a996-400d-be9e-78c6edd2cc8f 1548-2324 15466930

TABLE 1. Generic and sectional classifications of Plukenetia and Romanoa (NWSG2 = New World species group “2”; a = genera described by Pax and Hoffmann 1919; names in [hard brackets] predate Linnaean taxonomy and are provided for context).

Molecular phylogeny	Prior to Baillon	Baillon (1858)	Müller (1864, 1865, 1866)	Pax and Hoffmann (1919)	Webster (1975)	Gillespie (1993, 2007)	This treatment
Plukenetia	Vigia (Vell. 1832)	Fragariopsis	Fragariopsis	Fragariopsis	Fragariopsis	NWSG2	P. sect. Fragariopsis
subclade P1	Fragariopsis						comb. et stat. nov.
	(A.St.-Hil. 1840)
	Accia (A.St.-Hil. 1840)
	Botryanthe (Klotzsch
	1841)
Plukenetia	Plukenetia (L. 1753)	Sajorium sect.	P. sect.	P. sect.	Plukenetia	NWSG2	P. sect. Penninerviae
subclade P2		Pluknetia	Euplukenetia	Euplukenetia Apodandra a			sect. nov.
Plukenetia	[Pluknetia (Plum.	Sajorium sect.	P. sect.	P. sect.	Plukenetia	P. sect.	P. sect. Plukenetia
subclade P3	1703)]	Pluknetia	Euplukenetia	Cylindrophora		Plukenetia
	Plukenetia (L. 1753)		P. sect.	Eleutherostigma a	Eleutherostigma a
			Cylindrophora
				Elaeophora
				(Ducke 1925)
Plukenetia	n/a	n/a	P. sect.	Tetracarpidium	Plukenetia	P. sect.	P. sect.
subclade P4			Angostylidium	(Pax 1899) Angostylidium a		Angostylidium	Angostylidium
Plukenetia	[Sajor (Rumph. 1750)]	Sajorium sect.	P. sect. Sajor	Pseudotragia	Plukenetia	P. sect.	P. sect.
subclade P5		Hedraiostylus		(Pax 1908)		Hedraiostylus	Hedraiostylus
	Pterococcus (Hassk.		P. sect.	Pterococcus
	1842)		Hedraiostylus
Hedraiostylus
(Hassk. 1843)
	Ceratococcus (Meisn.
	1843)
Sajorium (Endl. 1843)
Plukenetia	n/a	n/a	n/a	n/a	Plukenetia	Madagascan	P. sect.
subclade P5						species	Madagascarienses
						group	sect. nov.
Romanoa	Anabaena (A.Juss.	Sajorium sect.	P. sect. Anabaena	Anabaenella a	Anabaena	Romanoa	Romanoa
	1824)	Anabaena
Romanoa (Trev. 1848)