1	Prophylls leathery in texture, utriculiform, inflated, much larger than nutlet at maturity		(2)
+	Prophylls thinly textured, open or utriculiform, if utriculiform then closely enveloping nutlet at maturity		(3)
2 (1)	Leaves flat with midrib conspicuous abaxially; culms over 6 cm; prophylls over 5 mm; plants of meadows and slopes up to 4600 m.		16 K. inflata
+	Leaves filiform, U-shaped in cross section, midrib not conspicuous abaxially; culms under 4 mm; prophylls to 5 mm; dwarf mat-forming plants of stony plateaus over 4800 m.		17 K. yadongensis
3 (1)	Nutlets mostly with 2 stigmas, compressed (biconvex) with 2 sharp edges		(4)
+	Nutlets all or mostly with 3 stigmas (in K. capillifolia, K. filifolia, and K. myosuroides sometimes with 2), trigonous, although one of angles sometimes extremely weak (so nutlet appearing compressed)		(6)
4 (3)	Spikes linear, more than 5 × as long as broad; sometimes some nutlets with 3 stigmas.		28 K. myosuroides
+	Spikes short, ca. 3 × as long as broad; nutlets all with 2 stigmas		(5)
5 (4)	Glumes pale brown to brown, margin hyaline or not; nutlets obovoid, very shortly stipitate; lower spikelets with 1 female and 2-5 male flowers (E China).		43 K. pusilla
+	Glumes dark brown, occasionally brown, margin narrowly hyaline or not; nutlets oblong, distinctly stipitate; lower spikelets with 1 female and 1-3 male flowers (W China).		44 K. karakorumensis
6 (3)	Rhizomes elongate, stoloniferous		(7)
+	Rhizomes extremely short, so plants densely tufted		(9)
7 (6)	Stigmas 3; nutlets not stipitate; prophylls usually over 7 mm; plants robust.		1 K. gammiei
+	Stigmas 2; nutlets long stipitate at maturity (stipes to 1 mm); prophylls to 6.5 mm; plants slender		(8)
8 (7)	Leaf blade flat, midrib distinct abaxially; prophylls to 3.6 mm; spikelets usually unisexual; glumes fawn brown.		14 K. macrantha
+	Leaf blade filiform, U-shaped, midrib not distinct abaxially; prophylls over 4 mm; lower spikelets of lateral spikes usually bisexual; glumes dark reddish brown.		15 K. hohxilensis
9 (6)	Inflorescence paniculate		(10)
+	Inflorescence spicate		(22)
10 (9)	Prophylls utriculiform (open only near apex); most spikelets unisexual (some near base of inflorescence branches sometimes bisexual)		(11)
+	Prophylls open almost to base; spikelets bisexual or unisexual		(16)
11 (10)	Prophylls to 3.5 mm; glumes of female spikelets to 3 mm.		6 K. fragilis
+	Prophylls over 3.5 mm; glumes of female spikelets over 4 mm		(12)
12 (11)	Leaves usually over 5 mm wide; prophylls over 8 mm, rachilla much shorter than nutlet; inflorescence branches linear, elongate.		3 K. curticeps
+	Leaves never over 5 mm wide; prophylls under 7 mm (if more then inflorescence dense, clublike and lowest involucral bract glumelike), rachilla subequaling or exceeding nutlet		(13)
13 (12)	Nutlet elliptic, ca. 2 × as long as wide (Yunnan only).		5 K. loliacea
+	Nutlet narrowly elliptic to linear, ca. 3 × as long as wide (more widespread)		(14)
14 (13)	Surface of prophyll glabrous; branches ± equal in length throughout inflorescence, curving outward.		2 K. laxa
+	Surface of prophyll minutely hispid near apex; lower inflorescence branches longer than upper, appressed or obliquely ascending		(15)
15 (14)	Rachilla shorter than nutlet; margins of glumes hyaline; culms slender.		4 K. sikkimensis
+	Rachilla almost or exceeding prophyll; margins of glumes not hyaline; culms stout.		7 K. uncinioides
16 (10)	Spikelets bisexual		(17)
+	Spikelets unisexual		(19)
17 (16)	Leaves filiform; some nutlets with 2 stigmas.		11 K. filifolia
+	Leaves flat; all nutlets with 3 stigmas		(18)
18 (17)	Culms very stout, acutely triquetrous; inflorescence very dense, club-shaped.		12 K. kansuensis
+	Culms slender, not obviously triquetrous; inflorescence branches slightly spreading.		13 K. royleana
19 (16)	Rhizome stout, oblique, very shortly creeping, bearing short, bladeless sheaths.		8 K. kuekenthaliana
+	Rhizome not developed, culms densely tufted, not bearing bladeless sheaths		(20)
20 (19)	Leaves filiform.		9 K. condensata
+	Leaves flat, midrib distinct abaxially		(21)
21 (20)	Prophylls over 5 mm, keels hispid.		10 K. tunicata
+	Prophylls to 4 mm, keels not hispid.		13 K. royleana
22 (9)	Prophylls over 6 mm.		21 K. robusta
+	Prophylls under 6 mm		(23)
23 (22)	Lower spikelets bisexual, with at least 1 male flower enclosed within prophyll		(24)
+	All spikelets unisexual, prophylls enclosing a nutlet and sterile rachilla, male and female spikelets sometimes in separate inflorescences or on separate plants		(33)
24 (23)	Leaves flat, midrib distinct abaxially		(25)
+	Leaves filiform, midrib not distinct abaxially		(27)
25 (24)	Prophylls with basal female and 2-7 male flowers.		18 K. humilis
+	Prophylls with basal female and 1 or 2 male flowers		(26)
26 (25)	Prophylls utriculiform, open only above middle; glumes not or minutely aristate; leaves short, stiff.		19 K. duthiei
+	Prophylls open almost to base; glumes long aristate; leaves longer, flaccid.		20 K. filicina
27 (24)	Prophylls open in upper half (SW Xizang).		22 K. burangensis
+	Prophylls open almost to base		(28)
28 (27)	Plants and spikes robust, basal sheaths conspicuous, papery, commonly orange-brown, shiny; male flowers up to 7 per prophyll		(29)
+	Plants and spikes more slender, basal sheaths often dark brown; male flowers 1-5 per prophyll		(30)
29 (28)	Glumes aristate, with conspicuous greenish midrib; inflorescence elongate; nutlets 3-4.5 mm.		23 K. cuneata
+	Glumes usually not aristate, midrib not conspicuous; inflorescence shorter and broader; nutlets 1.7-3.5 mm.		24 K. schoenoides
30 (28)	Culm stout (to 1.5 mm in diam.), erect, exceeding leaves; spike very short in relation to culm.		27 K. tibetica
+	Culm more slender (to 1.3 mm in diam.), not or slightly exceeding leaves; spike more elongate		(31)
31 (30)	Sheaths usually dark chocolate brown, sometimes shiny; glumes wide, blunt, with broad hyaline margin.		26 K. capillifolia
+	Sheaths paler, dull; glumes narrower, more acute, not or narrowly hyaline margined		(32)
32 (31)	Spike club-shaped; glumes orange-brown; male flowers usually 3-5 per spikelet; nutlets all with 3 stigmas.		25 K. setschwanensis
+	Spike linear; glumes dark brown; male flowers usually 1 per spikelet; some nutlets sometimes with 2 stigmas.		28 K. myosuroides
33 (23)	Spikes clearly bisexual (androgynous), with female spikelets below and male spikelets at apex		(34)
+	Spikes unisexual (occasionally with a few reduced male spikelets at apex)		(35)
34 (33)	Prophylls utriculiform, open only in upper half; glumes orange-brown.		29 K. nepalensis
+	Prophylls open to base; glumes dark brown.		30 K. cercostachys
35 (33)	Leaves flat		(36)
+	Leaves filiform		(38)
36 (35)	Prophylls narrowly elliptic or oblong, not embracing nutlets, keels obscure.		32 K. fissiglumis
+	Prophylls linear or linear-oblong, embracing nutlets, keels obvious and scabrid		(37)
37 (36)	Prophylls 2-3.5 mm, utriculiform when young; female inflorescence linear, 1.7-6.5 cm.		31 K. esenbeckii
+	Prophylls 5-5.5 mm, open to base even when young; female inflorescence oblong, 1.5-2 cm.		33 K. falcata
38 (35)	Prophylls utriculiform, open only in upper half		(39)
+	Prophylls open almost to base		(42)
39 (38)	Midvein of glume conspicuous, ca. 1/3 width of glume, green.		34 K. vidua
+	Midvein of glume less than 1/3 width of glume, not conspicuously green		(40)
40 (39)	Plants slender; glumes reddish brown to brown; prophylls elliptic (Sichuan).		35 K. yangii
+	Plants rigid; glumes pale brown; prophylls narrowly oblong or lanceolate (more widespread, especially Xizang)		(41)
41 (40)	Plants robust (culms 1-2 mm in diam.); inflorescences large, female ones 15-40 × 2-3 mm, male ones 17-30 × 4-5 mm; prophylls 3.5-5 mm.		36 K. littledalei
+	Plants slender (culms less than 1 mm in diam.); inflorescences small, female ones 10-20 × 2-3 mm, male ones 6-13 × 2-5 mm; prophylls 2.5-3 mm.		37 K. prainii
42 (38)	Spikes club-shaped (ca. 2 × as long as wide)		(43)
+	Spikes linear (more than 5 × as long as wide)		(44)
43 (42)	Dwarf, turf-forming plants; culms commonly under 5 cm; prophylls ca. 2.5 mm (widespread).		38 K. pygmaea
+	Erect, tufted plants; culms usually over 7 cm; prophylls over 3 mm (Gansu, Qinghai).		39 K. squamiformis
44 (42)	Plants slender, culms ca. 0.5 mm in diam.; spikes slender, linear.		40 K. vaginosa
+	Plants stout, culms ca. 1 mm or more in diam.; spikes oblong		(45)
45 (44)	Basal sheaths fibrillose, dull; female glumes 5-6 × 1.5-2 mm, apex acute to obtuse, not hyaline; prophylls 5-6 mm.		41 K. graminifolia
+	Basal sheaths not fibrillose, slightly shiny; female glumes 6.2-8 × 2.5-4 mm, apex broad, very blunt, hyaline; prophylls 7-9 mm.		42 K. woodii