1	Lamina with dense articulate hairs in addition to regular scales.		161 P. articulatipilosum
+	Lamina with only scales		(2)
2 (1)	Veins clavate and unusually swollen at ends		(3)
+	Veins linear and not swollen at ends		(6)
3 (2)	Fronds 7-12 cm; pinnae up 15 pairs.		162 P. liboense
+	Fronds up to 35 cm; pinnae up to 35 or more pairs		(4)
4 (3)	Pinnae undulate or shallowly toothed; all veins robust and obviously raised.		163 P. crassinervium
+	Pinnae irregularly toothed and often shortly spinulose at tips of teeth; veins raised more obviously at ends		(5)
5 (4)	Pinnae acute at apex; most pinnae spreading or ascending.		164 P. ichangense
+	Pinnae rounded at apex; most pinnae deflexed.		165 P. wulingshanense
6 (2)	Pinnae entire or repand (without spinules) on margin		(7)
+	Pinnae ?toothed and spinulose at least on upper part of margin		(16)
7 (6)	Ratio of length to width of pinnae larger than 2.5; sori close to pinna margins		(8)
+	Ratio of length to width of pinnae smaller than 2; sori close to pinna margins or midrib or located between them		(10)
8 (7)	Ratio of length to width of pinnae ca. 3; pinnae acuminate or acute at apex.		166 P. peishanii
+	Ratio of length to width of pinnae 2.5-3; pinnae rounded at apex		(9)
9 (8)	Ratio of length to width of pinnae 2.5-2.7; whole lamina fertile; sori above midrib of middle pinnae fewer than 4.		167 P. hainanicola
+	Ratio of length to width of pinnae ca. 3; lower part of lamina sterile; sori above midrib of middle pinnae 6-11.		168 P. guangxiense
10 (7)	Fronds appressed to substrate or slightly ascending; pinnae dark green, entire, leathery.		169 P. dangii
+	Fronds slightly or obviously ascending; pinnae green, repand, papery		(11)
11 (10)	Pinnae subsessile; sori closer to midrib than to pinna margin.		170 P. fengshanense
+	Pinnae stalked; sori closer to pinna margin than to midrib		(12)
12 (11)	Plants 1.6-4.1 cm tall; pinnae 6-8 pairs, middle pinnae 2.9-5.8 ?2.8-4.5 mm; lateral veins 2 or 3 pairs from midrib per pinna.		171 P. minutissimum
+	Plants 4-10 cm tall; pinnae 6-20 pairs, middle pinnae 3.7-7 ?2.5-6 mm; lateral veins (3 or)4-6 pairs from midrib per pinna		(13)
13 (12)	Lamina of larger plants bipinnatifid to bipinnatipartite; pinnae of larger plants with free lobes.		172 P. leveillei
+	Lamina never bipinnatifid to bipinnatipartite; pinnae never with free lobes		(14)
14 (13)	Rachis scale 0.70-1.41 mm, 0.10-0.25 mm wide at base; pinnae acute at apex.		173 P. oblanceolatum
+	Rachis scale 1.6-4 mm, 0.3-1 mm wide at base; pinnae rounded at apex		(15)
15 (14)	Broadest part of lamina well above midpoint; rachis scales 0.4-1 mm wide at base; basiscopic base of pinnae and rachis often forming a 20?60?angle; pinnae thickly papery, deltoid-ovate, approximate and often overlapping; acroscopic base rounded; microscales broad-type.		174 P. speluncicola
+	Broadest part of lamina near midpoint; rachis scales 0.3-0.6 mm wide at base; basiscopic base of pinnae and rachis often forming a 75?120?angle; pinnae papery, oblong, normally not overlapping; acroscopic base auriculate; microscales narrow-type.		175 P. cavernicola
16 (6)	Pinnae deltoid, those of lower part of lamina nearly equilateral-triangular; pinnae with 8-12 coarse and spinulose teeth.		176 P. subdeltodon
+	Pinnae various shapes but not deltoid, with or without teeth		(17)
17 (16)	Pinnae rounded, rounded-truncate or truncate at apex (with or without mucro)		(18)
+	Pinnae acuminate or acute (P. daguanense, P. huashanicola) at apex		(24)
18 (17)	Pinnae aristate-spinulose on margin, truncate at apex		(19)
+	Pinnae shallowly toothed or subentire but not aristate-spinulose on margin, rounded or rounded-truncate at apex		(21)
19 (18)	Pinnae thinly papery, acroscopic margins serrate and spinulose but not aristate-spinulose, basiscopic margins entire.		181 P. jinfoshanense
+	Pinnae leathery or nearly leathery, both acroscopic margins and upper portion of basiscopic margins or only acroscopic margins toothed and aristate-spinulose		(20)
20 (19)	Pinnae nearly leathery, dull adaxially, green; rachis scales lanceolate or broadly lanceolate, acuminate.		182 P. liui
+	Pinnae leathery, shiny adaxially, dark green; rachis scales ovate, caudate.		183 P. lanceolatum
21 (18)	Lamina shorter than 12 cm, thinly papery; scales long fimbriate on margin		177 P. oblongum
+	Lamina often longer than 20 cm, papery or nearly leathery; scales sparsely toothed, ciliate or entire on margin		(22)
22 (21)	Stipe scales ovate-lanceolate, dark brown, ciliate on margin; scales marginate (central cells narrow and straight while cells of margin irregularly curved).		178 P. kwangtungense
+	Stipe scales lanceolate, dark brown to castaneous, entire or sparsely toothed on margin; scales conform (middle and marginal cells similar in shape)		(23)
23 (22)	Auricles deltoid, well developed; only upper pinnae of lamina fertile.		179 P. dielsii
+	Auricles rounded, less well developed; most pinnae of lamina fertile.		180 P. pseudodeltodon
24 (17)	Nearly all pinnae obviously ascending; lamina with more than 20 pairs of pinnae		(25)
+	Most pinnae spreading or reflexed, only upper pinnae of lamina ascending; lamina with more or fewer than 20 pairs of pinnae		(26)
25 (24)	Pinnae acuminate; auricles narrowly deltoid, entire; nearly all pinnae fertile and sori located above midrib.		184 P. assurgentipinnum
+	Pinnae acute; auricles deltoid or nearly deltoid, with 1-3 teeth; only upper pinnae of lamina fertile and sori located above and mostly also below midrib.		185 P. submarginale
26 (24)	Most pinnae ?reflexed		(27)
+	Most pinnae spreading or ascending		(30)
27 (26)	Pinnae mostly falcate-oblong and bases as broad as upper portions of pinnae, acroscopic margins and distal basiscopic margins with regular open teeth.		186 P. houchangense
+	Pinnae oblong or ?falcate-oblong and obviously with broader bases		(28)
28 (27)	Pinnae falcate-oblong to oblong, crenate to repand.		187 P. deflexum
+	Pinnae oblong, sharply serrate		(29)
29 (28)	Stipe scales marginate (central cells narrowly rectangular while cells of margin irregularly curved); acroscopic margins and distal basiscopic margins of pinnae with regular shortly spinulose teeth.		188 P. consimile
+	Stipe scales conform; acroscopic margins and distal basiscopic margins of pinnae irregularly with shallow teeth, sometimes with shortly spinulose teeth.		189 P. yuanum
30 (26)	Ratio of length to width of pinnae lower than 2:1		(31)
+	Ratio of length to width of pinnae ca. 3:1 or higher		(39)
31 (30)	Pinna margins spinulose		(32)
+	Pinna margins not spinulose, or if spinulose then pinnae rhombic-ovate		(35)
32 (31)	Fronds smaller than 20 ?1.8 cm; pinnae ovate or ovate-oblong, smaller than 1 ?0.6 cm, symmetrical or asymmetrical at base		(33)
+	Fronds larger than 25 ?2 cm; pinnae oblong or shortly falcate, middle pinnae larger than 1.5 ?0.7 cm, obviously asymmetrical at base		(34)
33 (32)	Lamina 7-13 ?1-2 cm at middle; rachis scales lanceolate; pinnae shallowly toothed, weakly symmetrical at base.		190 P. muscicola
+	Lamina 2-6 ?0.85-1.25 cm at middle; rachis scales deltoid-ovate or ovate-lanceolate; pinnae serrate, strongly asymmetrical at base.		191 P. perpusillum
34 (32)	Pinnae oblong, mostly rounded or acute.		192 P. rupicola
+	Pinnae falcate, falcate-oblong, oblong, or rarely nearly deltoid, usually acute		193 P. deltodon
35 (31)	Basiscopic margins of pinnae attached at 30?90?angles to rachis		(36)
+	Basiscopic margins attached at 90?110?angles to rachis; pinnae green or yellowish green, papery		(37)
36 (35)	Pinnae dark green, thickly papery, acuminate; sori approximate when mature		194 P. puteicola
+	Pinnae green, papery, mostly acute; sori separate from each other when mature		195 P. nanchurnicum
37 (35)	Pinnae ovate, rhombic-ovate, or rarely oblong, 7-15 pairs; sori between midrib and pinna margin.		196 P. obliquum
+	Pinnae oblong or falcate-deltoid, 16-40 pairs; sori between midrib and pinna margin or close to pinna margin		(38)
38 (37)	Sori close to pinna margin; pinnae up to 40 pairs.		197 P. mengziense
+	Sori between midrib and pinna margin or slightly closer to pinna margin; pinnae fewer than 20 pairs.		198 P. paradeltodon
39 (30)	Lamina linear-lanceolate or narrowly elliptic-lanceolate, often narrower than 3 cm; pinnae shorter than 1.7 cm, narrower than 5 mm		(40)
+	Lamina lanceolate or broadly lanceolate, 3-12 cm wide; at least some pinnae up to 2 cm, broader than 7 mm		(43)
40 (39)	Lamina linear-lanceolate, slightly contracted toward lamina base; pinnae 40-100 pairs, narrowly deltoid or oblong-lanceolate, repand or bluntly toothed.		199 P. subacutidens
+	Lamina linear-lanceolate or narrowly elliptic-lanceolate, contracted or not contracted toward lamina base; pinnae 20-70 pairs, falcate-lanceolate or oblong, aristate-spinulose		(41)
41 (40)	Lamina narrowly elliptic-lanceolate, up to 52 cm, strongly contracted from lamina middle toward lamina base; pinnae 30-70 pairs, mostly falcate-lanceolate, shallowly toothed; auricles well developed, deltoid; sori exindusiate.		200 P. gymnocarpium
+	Lamina linear-lanceolate, up to 27 cm, slightly contracted toward lamina base; pinnae 20-40 pairs, often nearly rectangular, serrate; auricles weakly developed, rounded or deltoid; sori indusiate		(42)
42 (41)	Pinnae up to 40 pairs, ascendant; only ca. 1/3 of basiscopic margin of pinnae serrate; teeth on acroscopic margins 11-13; teeth on basiscopic margins 3; teeth on pinna margins forward-pointing or incurved; sori large, approximate or nearly so when mature.		201 P. daguanense
+	Pinnae up to 30 pairs, attached at right angles to rachis or reflexed; ca. half of basiscopic margin of pinnae serrate; teeth on acroscopic margins 7-9; teeth on basiscopic margins 4; teeth on pinna margins slightly open; sori small, obviously approximate when mature.		202 P. huashanicola
43 (39)	Pinnae deltoid-lanceolate; basiscopic margins of pinnae substraight; pinnae with coarse teeth.		203 P. pseudoacutidens
+	Pinnae falcate-lanceolate or nearly so; basiscopic margins of pinnae obviously curved; pinnae with shallow or coarse teeth		(44)
44 (43)	Basiscopic margins of pinnae repand or bluntly and shallowly toothed but not spinulose		(45)
+	Basiscopic margins of pinnae toothed and spinulose		(46)
45 (44)	Stipe scales with conform cells; auricles well developed, deltoid; veins strongly raised abaxially; sori close to pinna margins.		204 P. elevatovenusum
+	Stipe scales marginate (central cells narrow and long while cells of margin irregularly curved); auricles less well developed, often rounded and with a mucro; veins only slightly raised abaxially; sori between pinna margin and midrib.		205 P. excellens
46 (44)	Proximal margins of pinnae overlapping rachis; pinnae with coarse teeth; sori closer to pinna margins.		206 P. nayongense
+	Proximal margins of pinnae parallel and not overlapping rachis; pinnae with shallow teeth on margin; sori medial or closer to pinna margins		(47)
47 (46)	Teeth of pinna margins ?incurved or forward-pointing; sori marginal or medial.		207 P. acutidens
+	Teeth of pinna margins upward-pointing; sori medial.		208 P. longissimum