1 | Upper leaves broad, perfoliate; bracteoles broadly ovate |
1' | Upper leaves not perfoliate, linear, lanceolate or subulate |
2 | Flowers 6-16 in each umbellule; fruit 2.2-3.1 mm long; styles minute, much shorter than stylopodium, the latter 0.8-1.1 mm long; leaves generally with a tapering acumen
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2' | Flowers 15-25 in each umbellule; fruit 3.7-4.7 mm long; styles distinct, equalling or exceeding stylopodium, the latter 1.2-1.5 mm long; leaves acute but without a tapering acumen
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3 | Bracteoles lanceolate or ovate, concave, conspicuous, membranous or translucent
between the nerves, becoming erect and enveloping the fruits
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3' | Bracteoles linear-subulate; entirely herbaceous and opaque, not enveloping the fruits |
4 | Bracteoles with conspicuous ascending lateral veins between the nerves |
4' | Bracteoles without conspicuous lateral veins, or with the longitudinal nerves at most very shortly and irregularly branched |
5 | Umbels and umbellules subsessile or very shortly stalked, stalks generally less than 0.5 cm long |
5' | Umbels and umbellules distinctly stalked; stalks up to 3-4 cm long |
6 | Umbels subsessile or very shortly stalked, stalk generally less than 1.5 mm; fruits papillose or clothed with hooked bristles |
6' | Umbels distinctly stalked; stalks up to 4 cm long; fruits smooth, without papillae or bristles |
7 | Fruits covered with longitudinal rows of pale hooked bristles |
7' | Fruits covered with short pallid papillae |
8 | Bracts 4; bracteoles conspicuous, up to 7 mm long |
8' | Bracts 3; bracteoles inconspicuous, less than 3 mm long |
9 | Umbel rays very unequal; bracteoles usually 5; flowers usually 6 in each umbellule |
9' | Umbel rays subequal; bracteoles usually 2-3; flowers usually 2-3 in each umbellule |