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16b.5. Delphinium subsect. Depauperata M. J. Warnock, Phytologia. 78: 84. 1995.
Roots 2-8-branched, 2-10(-15) cm, twisted-fibrous, dry to fleshy; buds minute. Stems 1(-2) per root, usually unbranched, less than 60(-80) cm, elongation delayed 2-8 weeks after leaf initiation; base usually not narrowed, firmly attached to root. Leaves basal and cauline, largest near base of stem, others usually abruptly smaller on distal portion of stem; basal petioles ± spreading, cauline petioles ascending; basal leaves more rounded and with fewer, wider lobes than cauline leaves. Inflorescences usually 1-10 flowers per 5 cm, dense to open, cylindric, spurs often intersecting rachis; pedicel closely ascending rachis (straight), usually less than 2 cm, rachis to midpedicel angle less than 30°; bracts markedly smaller and fewer lobed than leaves. Fruits erect. Seeds rectangular to crescent-shaped, 1.3-2.3 × 0.8-1.4 mm, not ringed on proximal end, ± wing-margined; seed coats without wavy ridges, cells elongate, cell margins straight.
Species 3+ (3 in the flora): North America, possibly others in Asia.
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| 1 |
Margins of basal leaf, measured less than 1 cm from blade base, demarcating less than 90° of arc when leaf laid flat; sepal spurs at 30–45° angle to inflorescence axis. |
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35 Delphinium uliginosum |
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Margins of basal leaf, measured less than 1 cm from blade base, demarcating considerably more than 90° of arc when leaf laid flat; sepal spurs at near 90° angle to inflorescence axis. |
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(2) |
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| 2 (1) |
Cauline leaf blades (at least most of them) exceeding internodes; basal leaves absent at anthesis; cauline leaves 9 or more at anthesis. |
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34 Delphinium distichum |
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Cauline leaf blades much shorter than internodes; basal leaves usually present at anthesis; cauline leaves 3 or fewer at anthesis. |
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33 Delphinium depauperatum |
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Lower Taxa
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