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16b.8. Delphinium subsect. Bicoloria (Rydberg) N. I. Malyutin, Bot. Zhurn. (Moscow & Leningrad). 72: 687. 1987.
Delphinium sect. Bicoloria Rydberg, Fl. Rocky Mts., 309. 1917
Roots 2-9-branched at least 1 cm from stem attachment, (5-)10-30(-40) cm, diffuse-fibrous, ± braided, dry; buds minute. Stems 1(-2) per root, usually unbranched, elongation delayed 2-6(-10) weeks after leaf initiation; base ± narrowed, ± tenuously attached to root; proximal internodes much shorter than those of midstem. Leaves basal and cauline, largest leaves near base of stem, others often abruptly smaller on distal portion of stem; basal petioles spreading, cauline petioles ascending; blade shape and lobing similar throughout. Inflorescences usually with 2-6 flowers per 5 cm, open, ± pyramidal, seldom more than 3 times longer than wide, spurs rarely intersecting rachis; pedicel spreading, usually more than 1.5 cm, rachis to midpedicel angle more than 30°; bracts markedly smaller and fewer lobed than leaves. Fruits spreading. Seeds obpyramidal, 1.6-2.9 × 0.7-1.9 mm, ± ringed at proximal end, usually wing-margined; seed coats lacking wavy ridges, cells elongate, cell margins straight.
Species 6 (6 in the flora): w North America.
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| 1 |
Sepals red or yellow. |
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(2) |
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Sepals usually bluish, not red or yellow (sometimes maroon, white, or pink). |
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(3) |
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| 2 (1) |
Sepals red to reddish orange, not waxy. |
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47 Delphinium nudicaule |
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Sepals bright yellow, appearing waxy. |
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48 Delphinium luteum |
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| 3 (1) |
Sepals maroon; plants distinctly different from other individuals within populations. |
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(4) |
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Sepals blue or pink; plants usually similar to other individuals within populations. |
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(6) |
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| 4 (4) |
Leaf segments more than 5, 5 mm or less wide. |
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(4) |
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Leaf segments 5 or fewer, more than 5 mm wide. |
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(5) |
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| 5 (5) |
Proximal portion of stem hairy. |
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(5) |
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Proximal portion of stem glabrous. |
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(3) |
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| 6 (6) |
Leaves mostly above proximal 1/3 of stem; flowers usually more than 15 per main inflorescence axis. |
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(6) |
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Leaves mostly on proximal 1/3 of stem; flowers usually fewer than 20 per main inflorescence axis. |
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(7) |
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| 7 (6) |
Sepals pinkish; plants distinctly different from other individuals within populations. |
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(8) |
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Sepals dark blue to white; plants usually similar to other individuals within populations. |
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(9) |
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| 8 (8) |
Plants in populations with red flowers. |
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(8) |
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Plants in populations with blue flowers. |
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(7) |
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| 9 (7) |
Leaves ± succulent, clustered on proximal portion of stem. |
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(10) |
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Leaves not succulent, clustered on proximal portion of stem or not. |
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(11) |
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| 10 (9) |
Lateral sepals dark blue to white, spreading to reflexed. |
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46 Delphinium antoninum |
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Lateral sepals dark blue, spreading. |
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44 Delphinium glareosum |
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| 11 (9) |
Lower petal blade cleft usually less than 1/3 blade length. |
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43 Delphinium bicolor |
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Lower petal blade cleft more than 1/3 blade length. |
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45 Delphinium basalticum |
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Lower Taxa
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