Show Lower Taxa
Difference between revisions of "Delphinium subsect. Echinata"
Bot. Zhurn. (Moscow & Leningrad) 72: 689. 1987.
Basionym: Delphinium series Echinatae Ewan Bull. Torrey Bot. Club 69: 139. 1942
Treatment appears in FNA Volume 3.
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|authority=Echinatae Ewan | |authority=Echinatae Ewan | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>3-9(-20)-branched, 3-8(-30) cm, fascicled, dry to fleshy, ± succulent, thin threadlike segments restricted to termini of major segment; buds minute. <b>Stems</b> 1(-2) per root, unbranched, elongation delayed 2-10 weeks after leaf initiation; base usually not narrowed, firmly attached to root; proximal internodes much shorter than those of midstem. <b>Leaves</b> basal and cauline, largest near base of stem, others often abruptly smaller on distal portion of stem; basal petioles spreading, cauline petioles ascending; blades of basal leaves more rounded and with fewer, wider lobes than cauline leaves. <b>Inflorescences</b> usually with 2-11 flowers per 5 cm, dense to open, cylindric, spurs rarely intersecting rachis; pedicel ascending, usually less than 2 cm, rachis to midpedicel angle more than 30°; bracts markedly smaller and fewer lobed than leaves. <b>Fruits</b> erect. <b>Seeds</b> ± rectangular, 1.5-2.5 × 0.8-1.5 mm, not ringed at proximal end, ± wing-margined; seed coats without wavy ridges (sometimes with prism-shaped structures in <i>D. hansenii</i>), cells ± brick-shaped, cell margins straight or undulate.</span><!-- |
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name=Delphinium subsect. Echinata | name=Delphinium subsect. Echinata | ||
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|genus=Delphinium | |genus=Delphinium | ||
|section=Delphinium sect. Diedropetala | |section=Delphinium sect. Diedropetala | ||
|subsection=Delphinium subsect. Echinata | |subsection=Delphinium subsect. Echinata | ||
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Latest revision as of 21:51, 5 November 2020
Roots 3-9(-20)-branched, 3-8(-30) cm, fascicled, dry to fleshy, ± succulent, thin threadlike segments restricted to termini of major segment; buds minute. Stems 1(-2) per root, unbranched, elongation delayed 2-10 weeks after leaf initiation; base usually not narrowed, firmly attached to root; proximal internodes much shorter than those of midstem. Leaves basal and cauline, largest near base of stem, others often abruptly smaller on distal portion of stem; basal petioles spreading, cauline petioles ascending; blades of basal leaves more rounded and with fewer, wider lobes than cauline leaves. Inflorescences usually with 2-11 flowers per 5 cm, dense to open, cylindric, spurs rarely intersecting rachis; pedicel ascending, usually less than 2 cm, rachis to midpedicel angle more than 30°; bracts markedly smaller and fewer lobed than leaves. Fruits erect. Seeds ± rectangular, 1.5-2.5 × 0.8-1.5 mm, not ringed at proximal end, ± wing-margined; seed coats without wavy ridges (sometimes with prism-shaped structures in D. hansenii), cells ± brick-shaped, cell margins straight or undulate.
Discussion
Species 4 (4 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Proximal petioles glabrous to puberulent with short (less than 0.5 mm) appressed and/or arched hairs. | > 2 |
| 1 | Proximal petioles with long (more than 0.5 mm), straight spreading hairs. | > 3 |
| 2 | Sepal color and/or stem pubescence different from that of other individuals with which they occur; stem base puberulent with short arched hairs. | Delphinium hesperium subsp. pallescens |
| 2 | Sepal color and stem pubescence similar to that of other individuals with which they occur; stem base glabrous to pubescent with short straight hairs. | Delphinium hesperium |
| 3 | Seeds echinate, appearing fuzzy to naked eye; lateral sepals 13 mm or shorter; flowers usually more than 12 per main inflorescence branch. | Delphinium hansenii |
| 3 | Seeds not echinate, appearing ± smooth to naked eye; lateral sepals 10 mm or longer; flowers usually fewer than 12 per main inflorescence branch. | > 4 |
| 4 | Stem base longitudinally ridged. | Delphinium hesperium |
| 4 | Stem base not longitudinally ridged. | > 5 |
| 5 | Margins of lower petals ciliate; bracteoles usually 7 mm or less from sepals; sepal spur straight. | Delphinium variegatum |
| 5 | Margins of lower petals glabrous; bracteoles usually 7 mm or more from sepals; sepal spur often downcurved for more than 3 mm at apex. | Delphinium hutchinsoniae |