Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
|
..2 Tepals present and well-developed (usually 5 present, at least the outer tepals >2 mm long and with a visible midvein). |
....3 Tepals 1 or 2, lanceolate to linear; [subgenus Acnida, section Acnida] |
....3 Tepals 5, at least the inner spatulate; [subgenus Acnida, section Saueranthus]. |
......4 Outermost tepal obtuse or notched (similar to the others), the midvein excurrent slightly or not at all |
......4 Outermost tepal acute or acuminate (dissimilar to the inner obtuse tepals), the midvein excurrent into a rigid point |
..2 Tepals lacking, or rudimentary (often only 1-2 present, these <1 (2) mm long and lacking a visible midvein); subgenus Acnida, section Acnida]. |
........5 Seeds 2-3 mm long; utricle 2.5-4 mm long |
........5 Seeds 0.7-1.2 mm long; utricle 1-2.5 mm long. |
..........6 Utricle with conspicuous and regular longitudinal ridges; bract > 1.5 mm long, with a stout midrib not far excurrent beyond the bract blade |
..........6 Utricle smooth or irregularly tuberculate; bract < 1.5 mm long, with a slender excurrent midrib |
............ 7 Leaf blades narrow, all or nearly all < 1 cm wide |
............ 7 Leaf blades broader, well-developed leaves 1-3 cm wide |
1 Plants staminate (some identifications following this lead may not be reliable). |
............ ..8 Outer tepals with prominent midribs, usually longer than the inner tepals; bracts >2 mm long (or 1-2 mm long in A. tuberculatus), mostly with prominent midribs. |
............ ....9 Outer tepals with apex acute or obtuse; dark midribs not excurrent |
............ ....9 Outer tepals with apex acuminate; midribs excurrent as rigid spines. |
............ ......10 Bracts ca. 4 mm long, equaling or exceeding the outer tepals |
............ ......10 Bracts ca. 2 mm long, shorter than the outer tepals |
............ ..8 Outer tepals without prominent midribs, not appreciably longer than the inner tepals; bracts <2 mm long, the midribs usually not prominent (except sometimes in A. australis). |
............ ........11 Bracts < 1 mm long; midribs scarcely excurrent |
............ ........11 Bracts > 1mm long; midribs often conspicuously excurrent. |
............ ..........12 Leaf blades narrow, all or nearly all < 1 cm wide |
............ ..........12 Leaf blades broader, well-developed leaves 1-3 cm wide |
............ ............ 13 Bracts with moderately prominent midribs; midribs of outer tepals excurrent |
............ ............ 13 Bracts with slender midribs; midribs of outer sepals not excurrent |