A new Amorphophallus (Araceae) species from Thailand and an updated key to the Longituberosus and Saraburiensis subclades Author Scholten, Justin Department of Plant Biology, 516 Mann Library, Cornell University, Ithaca, New York 14853, United States of America. Author Livingston, David 3318 Ellington Ct., Ft. Myers, Florida 33916, United States of America. Author Sizemore, Mary 751 Deerfoot Rd., Deland, Florida 32720, United States of America. text Phytotaxa 2024 2024-01-05 633 2 101 107 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.633.2.1/51414 journal article 284668 10.11646/phytotaxa.633.2.1 76e0a0be-7b95-46cb-9061-f800036ab3cd 1179-3163 10462290

TABLE 1. Morphological comparison of Amorphophallus bantae and closely related species.

	A. bantae	A. tenuistylis	A. longituberosus	A. albispathus	A. tenuispadix
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Peduncle length	28–34 cm	64–88 cm	10–76 cm	20–40 cm	11–29 cm
Peduncle exterior	light green with purple vertical stripes and small whitish mottles	olive green with small grayish mottles	gray or light pink with green or brown mottles and (often) dark vertical stripes	uniformly pink or olivegreen grading up to pink	light brown to pinkish with few to many dark elongate mottles
Spadix length	13–15 cm	24–48 cm	5.0–15.5 cm	8–13 cm	5.5–12.0 cm
Spadix-spathe ratio	spadix as long or shorter than spathe	spadix longer than spathe	spadix as long or shorter than spathe	spadix shorter than spathe	spadix as long or shorter than spathe
Appendix size	5.5–6.5 cm long, as broad or narrower than staminate zone	16–30 cm long, as broad or narrower than staminate zone	2.5–8.0 cm long, as broad or broader than staminate zone, never narrower	2–8 cm long, much broader than staminate zone	1.5–4.0 cm long, much broader than staminate zone
Appendix color	purplish-brown	reddish-purple	whitish-beige	whitish-beige	whitish-beige
Spathe length	14–16 cm	19–40 cm	5–20 cm	6–14 cm	5–13 cm
Spathe shape	elliptic	lanceolate	elliptic to elongate triangular	triangular-ovate	elliptic to lanceolate
Spathe limb apex	mucronate	acute or acuminate	acute	acute or acuminate	acute or acuminate
Spathe exterior	uniformly dark green with purplish vertical stripes and small whitish ovoid mottles	limb reddish-brown with small dark mottles; base grayish-green with small gray mottles	uniformly light green or gray with or without large brownish-green mottles or vertical stripes	uniformly greenishwhite or pinkish-white, occasionally grading to darker pink toward base	greenish-gray or pinkish gray (rarely white) with or without large dark ovoid mottles
Spathe interior	limb uniformly dark green; base reddishbrown with elongate warts.	limb uniformly reddishbrown; base dark purple with long, (often branched) warts	limb uniformly light green or gray; base as limb or reddish with small elongate warts	as exterior or occasionally paler with small elongate warts	as exterior or paler, base typically without mottles and loosely verrucose
Pistillate flower density	congested	sparse; ovaries 1–4 mm apart	congested	congested	congested
Ovaries	2–3-locular	3-locular	3-locular	3–4-locular	1-locular
Stigma shape	depressed; 2–3 lobed	hemispheric; 2–3 lobed	flattened; 3–4 lobed	flattened; 3–4 lobed or bilabiate	discoid; bilabiate
Stigma color	dark yellow to pale brown	bright yellow	bright yellow	white or yellow	white or yellow
Style length Style color	ca. 1 mm reddish-purple	3–4 mm reddish-purple	2–3 mm green	ca. 1 mm green	ca. 1 mm green