Difference between revisions of "Agave ×ajoensis"
Novon 11: 414, fig. 2. 2001.
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| − | |discussion=<p><i>Agave ×ajoensis</i> appears to be of hybrid origin involving <i>A. deserti </i>var.<i> simplex</i> and <i>A. schottii </i>var.<i> schottii</i>. It is a triploid, having a chromosome number of 2n = 90; in the same area, <i></i>var.<i> simplex</i> is a diploid (2n = 60) and <i></i>var.<i> schottii</i> is a tetraploid (2n = 120).</p> | + | |discussion=<p><i>Agave ×ajoensis</i> appears to be of hybrid origin involving <i>A. deserti </i>var.<i> simplex</i> and <i>A. schottii </i>var.<i> schottii</i>. It is a triploid, having a chromosome number of 2n = 90; in the same area, <i></i></i>var.<i><i> simplex</i> is a diploid (2n = 60) and <i></i></i>var.<i><i> schottii</i> is a tetraploid (2n = 120).</p> |
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|publication year=2001 | |publication year=2001 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V26/V26_924.xml |
|genus=Agave | |genus=Agave | ||
|species=Agave ×ajoensis | |species=Agave ×ajoensis | ||
Revision as of 20:34, 24 September 2019
Plants acaulescent, freely suckering; rosettes solitary or more commonly cespitose, 1.9–4 × 2.5–4.5 dm. Leaves spreading, widest near middle, 16–34 × 1.5–3 cm; blade light green, without “budprints” but sometimes with a lighter green midstripe, linear-lanceolate, rigid, adaxially shallowly concave toward apex, abaxially thickly convex toward base; margins entire, straight, nonfiliferous, unarmed except for small interstitial teeth near leaf base; apex acute to long-acuminate, spine reddish brown, aging gray, subulate, 1.5–2.5 cm. Scape 2.5–3.5 m. Inflorescences subspicate to narrowly racemose-paniculate on distal 1/3; bracts caducous, narrowly triangular, 2–3 cm; lateral branches 30–40, ascending, 4 cm or shorter. Flowers (3–)4–6 per cluster, erect, straight, (3.2–)3.5–5.3 cm; perianth yellow, tube funnelform, (4–)6–21 × 8–13 mm, limb lobes erect to ascending, slightly unequal, 10–20 mm; stamens slightly exserted; filaments inserted equally or subequally 6–16 mm above base of perianth tube, erect, light yellow, (1.7–)2–3 cm; anthers yellow, 9–14 mm; ovary 1–1.7 cm, neck constricted, 2–6 mm. Capsules short-pedicellate, ellipsoid, 1.2–2.1 cm, apex short-beaked. Seeds unknown. 2n = 90.
Phenology: Flowering late spring–summer.
Habitat: Rocky slopes in desert scrub and grasslands
Elevation: 900–1100 m
Discussion
Agave ×ajoensis appears to be of hybrid origin involving A. deserti var. simplex and A. schottii var. schottii. It is a triploid, having a chromosome number of 2n = 90; in the same area, var. simplex is a diploid (2n = 60) and var. schottii is a tetraploid (2n = 120).
Selected References
None.