What’s a dichotomous key?
Help
- Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
- You are here:
- Dichotomous Key
- Aquifoliaceae
Aquifoliaceae
This family contains exactly one genus, Ilex.
See list of 8 species in this genus-
1a. Perianth 4- or 5-merous; sepals minute, deciduous in fruit; petals linear to linear-oblong, yellow-white, distinct; stamens free; leaves without stipules; branchlets and winter buds purple
-
1b. Perianth 4- to 8-merous; sepals evident, persistent in fruit; petals obovate, white, connate at the base; stamens adnate to the corolla tube for a short distance; leaves with a stipular vestige on each side; branchlets and winter buds gray to brown
-
2a. Leaf blades thick, coriaceous, evergreen
-
3a. Leaf blades with a spine-tip and often with 2 or more remote, spine-tipped teeth per margin, (30–) 50–100 mm long; carpellate flowers 4-merous; drupe red (rarely yellow), 7–10 mm thick
-
4a. Leaf blades dull or barely sublustrous; flowers and fruits solitary or in solitary, peduncled cymes on the branchlets of the current season
-
4b. Leaf blades highly lustrous, especially adaxially; flowers and fruits usually clustered, produced from the axils on branches of the previous season
-
-
3b. Leaf blades merely toothed, without spines [Fig. 367], 15–50 mm long; carpellate flowers 6- to 8-merous (4-merous in I. crenata); drupe black, 4–5 (–8) mm thick
-
5a. Leaf blades with 1–3 teeth per margin [Fig. 367], the teeth usually restricted to the apical ⅓ of the blade; flowers 6- to 8-merous; drupe 4–5 mm thick
-
5b. Leaf blades with (3–) 4–10 teeth per margin, the teeth usually not restricted to the apical portion of the blade; flowers 4-merous; drupe 6–8 mm thick
-
-
-
2b. Leaf blades thinner, herbaceous, deciduous
-
6a. Sepals eciliate [Fig. 368]; staminate flowers on peduncles 8–16 mm long; drupe usually orange-red
-
6b. Sepals ciliate (also sometimes pubescent on the abaxial surface) [Fig. 369]; staminate flowers borne on peduncles 1–4 mm long; drupe usually deep red
-
7a. Carpellate flowers 4- or 5 (–6)-merous, with ciliate-margined petals [Fig. 369]; pyrenes striate-ribbed on outer surface
-
7b. Carpellate flowers 5- to 8-merous, with entire or inconspicuously erose-margined petals; pyrenes smooth on outer surface
-
-
-
Show photos of: Each photo represents one species in this genus.