Arisaema : key to North American Taxa
1a. Leaflets (3-5). Spadix blunt apically, shorter than
spathe. 2. A. triphyllum
2b. leaflets 5. var. quinatum
2b. leaflets 3. 3.
3a. Leaves glaucous beneath at maturity. Spathe flange
4.5 - 9.0 mm wide. Spathe hood green or green with
purple stripes. Sterile spadix appendage club-shaped,
rarely cylindrical. Stomatal guard cell length mostly
greater than 40 µm ssp. triphyllum
3b. Leaves polished or lustrous beneath, not glaucous.
Spathe flange 1-3 mm wide. Sterile spadix
appendage cylindrical, rarely club-shaped. Stomatal
guard cell length mostly less than 40 µm. 4.
4a. Spathe tube strongly fluted. Spathe hood green
with white or purple stripes. ssp. stewardsonii
4b. Spathe tube not fluted or rarely weakly fluted.
Spathe hood green or purple, not striped. ssp. pusillum
1b. Leaflets (5-) 7-13 (-21). Spadix tapering apically,
much longer than spathe. 4. A. dracontium
5a. Spathe tightly inrolled around the spadix. To 1.5cm
broad when unfurled. var. dracontium
5b. Spathe flared distally, forming a blade, to 2.5cm
broad. var. macrospathum
Based upon:
http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=102590
Ward, Daniel B. (2012) Keys to the Flora of Florida – 31 Arisaema (Araceae). Phytologia 94(2) pp. 151 – 158.
top of page
$0.00Price
Out of Stock
bottom of page