Difference between revisions of "Neoholmgrenia"
Novon 19: 131. 2009.
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| − | --><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, caulescent; with slender taproot. <b>Stems</b> densely leafy distally, nearly leafless proximally, with many slender, ascending branches from base. <b>Leaves</b> cauline, alternate, often appearing subverticillate and densely tufted; stipules absent; sessile; blade margins entire. <b>Inflorescences</b> spikes, densely leafy. <b>Flowers</b> bisexual, actinomorphic, buds nodding, becoming erect; floral tube deciduous (with sepals, petals, and stamens) after anthesis, relatively narrow, with basal nectary; sepals 4, reflexed singly or in pairs; petals 4, yellow, fading pale yellowish orange, without spots; stamens 8 in 2 unequal series, epipetalous ones sometimes very reduced, or 4 in 1 series, epipetalous ones absent, anthers versatile, pollen shed singly; ovary 4-locular, stigma entire, subglobose, surface probably wet and non-papillate. <b>Fruit</b> a capsule, straight, strongly flattened, somewhat torulose, regularly loculicidal, dehiscent nearly throughout length; sessile. <b>Seeds</b> numerous, in 1 row per locule, narrowly obovoid, smooth, shiny, without dots or blotches. <i>x<i | + | --><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, caulescent; with slender taproot. <b>Stems</b> densely leafy distally, nearly leafless proximally, with many slender, ascending branches from base. <b>Leaves</b> cauline, alternate, often appearing subverticillate and densely tufted; stipules absent; sessile; blade margins entire. <b>Inflorescences</b> spikes, densely leafy. <b>Flowers</b> bisexual, actinomorphic, buds nodding, becoming erect; floral tube deciduous (with sepals, petals, and stamens) after anthesis, relatively narrow, with basal nectary; sepals 4, reflexed singly or in pairs; petals 4, yellow, fading pale yellowish orange, without spots; stamens 8 in 2 unequal series, epipetalous ones sometimes very reduced, or 4 in 1 series, epipetalous ones absent, anthers versatile, pollen shed singly; ovary 4-locular, stigma entire, subglobose, surface probably wet and non-papillate. <b>Fruit</b> a capsule, straight, strongly flattened, somewhat torulose, regularly loculicidal, dehiscent nearly throughout length; sessile. <b>Seeds</b> numerous, in 1 row per locule, narrowly obovoid, smooth, shiny, without dots or blotches. <i>x</i> = 7.</span><!-- |
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|publication year=2009 | |publication year=2009 | ||
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| − | |source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/e39f0e846f172941159b2045254d62d10d9823f6/coarse_grained_fna_xml/V10/V10_619.xml |
|subfamily=Onagraceae subfam. Onagroideae | |subfamily=Onagraceae subfam. Onagroideae | ||
|tribe=Onagraceae tribe Onagreae | |tribe=Onagraceae tribe Onagreae | ||
Latest revision as of 11:33, 9 May 2022
Herbs, annual, caulescent; with slender taproot. Stems densely leafy distally, nearly leafless proximally, with many slender, ascending branches from base. Leaves cauline, alternate, often appearing subverticillate and densely tufted; stipules absent; sessile; blade margins entire. Inflorescences spikes, densely leafy. Flowers bisexual, actinomorphic, buds nodding, becoming erect; floral tube deciduous (with sepals, petals, and stamens) after anthesis, relatively narrow, with basal nectary; sepals 4, reflexed singly or in pairs; petals 4, yellow, fading pale yellowish orange, without spots; stamens 8 in 2 unequal series, epipetalous ones sometimes very reduced, or 4 in 1 series, epipetalous ones absent, anthers versatile, pollen shed singly; ovary 4-locular, stigma entire, subglobose, surface probably wet and non-papillate. Fruit a capsule, straight, strongly flattened, somewhat torulose, regularly loculicidal, dehiscent nearly throughout length; sessile. Seeds numerous, in 1 row per locule, narrowly obovoid, smooth, shiny, without dots or blotches. x = 7.
Distribution
w North America.
Discussion
Species 2 (2 in the flora).
R. A. Levin et al. (2004) found strong molecular support for Neoholmgrenia in a clade with Camissoniopsis and Tetrapteron. P. H. Raven (1969) found Neoholmgrenia (as Camissonia sect. Nematocaulis) to be one of the most distinctive groups in Camissonia by virtue of its relatively short (less than 10 mm), flattened capsules and densely clustered leaves near the tips of otherwise leafless stems. Reproductive features include: self-compatible; flowers diurnal; outcrossing and pollinated by small bees or flies, or autogamous and occasionally cleistogamous (Raven).
Selected References
None.
Lower Taxa
Key
| 1 | Petals 2.5–5 mm; styles 4.5–6 mm. | Neoholmgrenia hilgardii |
| 1 | Petals 0.8–2.3 mm; styles 1.7–3 mm. | Neoholmgrenia andina |