Contains 14 accepted taxa overall.

Characteristics
Hymenocallis Salisb.
SPIDERLILY
Classification
ASPARAGALES
Hymenocallis
Citation
HYMENOCALLIS Salisbury, Trans. Hort. Soc. London 1: 338. 1812.
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TYPE: Hymenocallis littoralis (Jacquin) Salisbury (Pancratium littorale Jacquin) Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 1: 533. 1913.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Hymenocallis choctawensis FLORIDA PANHANDLE SPIDERLILY Native OBL (NWPL) OBL (DEP)
Hymenocallis crassifolia COASTALPLAIN SPIDERLILY; COASTAL CAROLINA SPIDERLILY Native OBL (NWPL) OBL (DEP)
Hymenocallis duvalensis WHITESANDS SPIDERLILY; DIXIE SPIDERLILY Native OBL (DEP)
Hymenocallis franklinensis COW CREEK SPIDERLILY Native Endemic
Hymenocallis gholsonii GHOLSON'S SPIDERLILY Native Endemic
Hymenocallis godfreyi GODFREY'S SPIDERLILY; ST. MARK'S MARSH SPIDERLILY Native Endemic Endangered-State OBL (DEP)
Hymenocallis henryae var. glaucifolia Native Endemic Endangered-State
Hymenocallis henryae var. henryae HENRY'S SPIDERLILY; GREEN SPIDERLILY Native Endemic Endangered-State OBL (DEP)
Hymenocallis latifolia MANGROVE SPIDERLILY; PERFUMED SPIDERLILY Native FACW (NWPL) OBL (DEP)
Hymenocallis occidentalis NORTHERN SPIDERLILY; WOODLAND SPIDERLILY Native OBL (NWPL) OBL (DEP)
Hymenocallis palmeri ALLIGATORLILY Native Endemic OBL (NWPL) OBL (DEP)
Hymenocallis puntagordensis SMALLCUP SPIDERLILY Native Endemic OBL (NWPL) OBL (DEP)
Hymenocallis rotata SPRING-RUN SPIDERLILY Native Endemic OBL (NWPL)
Hymenocallis tridentata FLORIDA SPIDERLILY Native Endemic
[Family identification key]
1.  Leaves evergreen; inflorescence of 3-15 flowers; perianth tube (6)7.5-20 cm long; filaments green (at least distally); flowering late Jun-Oct
2
1.  Leaves deciduous; inflorescence of 1-9(12) flowers; perianth tube 4-13.5 cm long; filaments white; flowering Feb-Aug
3
2.  Leaves 50-100 cm long, 4-9 cm wide, blade broadly liguliform; inflorescence of (5)9-15 flowres; margins between free portions of filaments wavy, prominent projections absent; ovary ovoid, 0.9-1.6 cm long, 5-10 mm wide; flowering late Jun-Oct
2.  Leaves 35-75 cm long, 1.5-3 cm wide, blade narrowly liguliform; inflorescence of 3-5 flowers; margins between free portions of filaments with 1-2 prominent lacerations; ovary pyriform, 1.5-2.4 cm long, ca. 10 mm wide; flowering late Jun-Sep
3.  Ovary 14-30 mm long, 6-15 mm wide; ovules 4-8 per locule
4
3.  Ovary 7-15 mm long, 5-10 mm wide; ovules 1-3(4) per locule
9
4.  Inflorescence of 1-2 flowers; tepals pale green
5
4.  Inflorescence of 2-4 flowers; tepals white
7
5.  Inflorescence of 1 flower; tepals ascending, equal to or shorter than perianth tube
5.  Inflorescence of 2(3) flowers; tepals long-spreading, nearly always longer than perianth tube
6
6.  Plants often in dense clumps; leaf blades glaucous
6.  Plants solitary or in loose clumps; leaf blades not glaucous or only slightly so
7.  Corona 6-9 cm wide
7.  Corona 4-6 cm wide
8
8.  Longest leaf not exceeding 4 dm at anthesis; free filaments to 3 cm; anthers 1.2–1.5 cm
8.  Longest leaf exceeding 4 dm at anthesis; free filaments to 4 cm; anthers 1.5–2 cm
9.  Leaf blades oblanceolate, distinctly wider beyond middle before tapering; inflorescence with 2-9 flowers
10
9.  Leaf blades liguliform to narrowly lanceolate or narrowly oblanceolate; inflorescence with 2-3 flowers
11
10.  Bulbs rhizomatous; leaves coriaceous, not glaucous; scape bracts 3-4(6) cm long, apex acute; flowering Apr-Jul
10.  Bulbs not rhizomatous; leaves noncoriaceous, glaucous; scape bracts 4-7 cm long, apex long-acuminate; flowering Jul-Aug
11.  Scape bracts narrowly lanceolate, 2.5–5.5 cm × 7–12 mm
12
11.  Scape bracts lanceolate, 3–5 cm × 10–20 mm
13
12.  Leaves suberect to erect, the blade channeled nearly throughout, typically liguliform; staminal corona funnelform at full anthesis, soon gradually spreading
12.  Leaves chiefly arching low, often appearing prostrate, the blade channeled proximally, occasionally narrowly oblanceolate; staminal corona rotate at full anthesis
13.  Bulbs 2.5-4 cm long; scape bracts 3-4(4.5) cm long, 1-1.5 cm wide
13.  Bulbs 4.5-7.5 cm long; scape bracts 4-5 cm long, 1.5-2 cm wide
Genus Synonyms
Synonym Full Citation Basionym Type
Choretis Choretis Herbert, Amaryllidaceae 61, 75, 219. 1837. TYPE: Non designatus.
Ismene Ismene Salisbury ex Herbert, Appendix 45. 1821. TYPE: Ismene amancaes (Ker-Gawler) Herbert (Pancratium amancaes Ker Gawler)
Nemepiodon Nemepiodon Rafinesque, Fl. Tellur. 4: 22. 1838 ("1836"). TYPE: Non designatus.
Siphotoma Siphotoma Rafinesque, Fl. Tellur. 4: 22. 1838 ("1836"). TYPE: Siphotoma calathina (Ker Gawler) Rafinesque, nom. illegit. (Pancratium calathina Ker Gawler, nom. illegit.; Pancratium calathiforme Redoute)
Tomodon Tomodon Rafinesque, Fl. Tellur. 4: 22. 1838 ("1836"). TYPE: Non designatus.