1	Perianth pubescent, sometimes sparsely or minutely so.		(2)
+	Perianth glabrous, rarely papillose.		(8)
2 (1)	Leaves 1--1.5 cm wide; perianth 7--10 mm		15 Aletris megalantha
+	Leaves less than 1 cm wide; perianth less than 7 mm.		(3)
3 (2)	Bracts 2--5 × flower length		14 Aletris glandulifera
+	Bracts shorter than or subequaling flower length, sometimes a few bracts near base of raceme to 2 × flower length.		(4)
4 (3)	Flowers usually subsessile, pedicels absent to 1(--2) mm, bract and bracteole borne on distal 1/2 of pedicel (often near apex); perianth lobes linear-lanceolate or narrowly oblong-lanceolate to linear; capsule turbinate, oblong-obovoid, obovoid, or ovoid.		(5)
+	Flowers distinctly pedicellate, pedicels 0.5--3.5 mm, bract and bracteole borne on proximal 1/2 of pedicel (often near base); perianth lobes ovate to lanceolate; capsule subglobose.		(6)
5 (4)	Capsule turbinate, oblong-obovoid, or obovoid, distinctly angular, 3--5 × 2--3 mm, abruptly contracted distally when dehisced; leaves 2--4(--5) mm wide		2 Aletris spicata
+	Capsule ovoid, not angular, 4--6 × 3--4.5 mm, not or only slightly contracted distally when dehisced; leaves (2--)3--5(--8) mm wide		3 Aletris stenoloba
6 (4)	Leaves 1--5, laxly tufted; rhizome cormlike, 3--7 mm in diam.		13 Aletris scopulorum
+	Leaves numerous, densely tufted; rhizome not cormlike.		(7)
7 (6)	Perianth lobes oblong-lanceolate, 2--3 mm		11 Aletris pedicellata
+	Perianth lobes ovate, ca. 1 mm		12 Aletris yaanica
8 (1)	Raceme rachis and pedicels glabrous; bract and bracteole borne on proximal 1/2 of pedicel (often near base).		(9)
+	Raceme rachis and pedicels pubescent or puberulent; bract and bracteole usually borne on distal 1/2 of pedicel (often near apex).		(11)
9 (8)	Raceme covered with viscid secretion; perianth tube urceolate, strongly constricted at apex, lobes erect		1 Aletris glabra
+	Raceme not covered with viscid secretion; perianth tube broadly funnelform, lobes strongly recurved or revolute.		(10)
10 (9)	Rhizome not surrounded by mass of fibers but sometimes by persistent, dead leaves; capsule with persistent stigma not or only slightly thickened		6 Aletris cinerascens
+	Rhizome surrounded by mass of fibers from disintegrated leaf bases; capsule with persistent stigma conspicuously thickened and capitate		5 Aletris gracilis
11 (8)	Rhizome often surrounded by mass of fibers from disintegrated leaf bases; roots thickened, fleshy; leaves usually rather few (5--10) and laxly tufted; capsule ovoid-ellipsoid or ovoid-conical		7 Aletris pauciflora
+	Rhizome not surrounded by mass of fibers; roots fibrous; leaves numerous and densely tufted; capsule narrowly ovoid to subglobose.		(12)
12 (11)	Raceme densely capitate or oblong-capitate; bract and bracteole borne on proximal 1/2 of pedicel (often near base)		8 Aletris capitata
+	Raceme elongate and lax to short and dense but not capitate; bract and bracteole usually borne at or near apex of pedicel.		(13)
13 (12)	Perianth 4--7.5 mm, lobes 2--5.5 mm, erect, spreading, recurved, or revolute, 1--5 × tube length		4 Aletris laxiflora
+	Perianth 3--4.5 mm, lobes 1--2 mm, erect or recurved, 0.3--1 × tube length.		(14)
14 (13)	Scape very slender, wiry, often somewhat flexuous, 7--20 cm; bract shorter than perianth; perianth often densely papillose, lobes recurved		10 Aletris alpestris
+	Scape relatively stout, not wiry, straight and erect, 1.5--10 cm; bract equaling or longer than perianth; perianth not or scarcely papillose, lobes erect or slightly recurved		9 Aletris nana