Difference between revisions of "Agave utahensis"

Engelmann in S. Watson

in S. Watson, Botany (Fortieth Parallel), 497. 1871.

IllustratedEndemic
Treatment appears in FNA Volume 26. Mentioned on page 450.
(fix subspecies links in key)
(fix subspecies links in key second try)
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|1
 
|1
 
|Leaves 3–5.5 cm wide; rosettes 4–10 dm wide; flowers (2.6–)2.9–4.3 cm.
 
|Leaves 3–5.5 cm wide; rosettes 4–10 dm wide; flowers (2.6–)2.9–4.3 cm.
|[[Agave utahensis subsp. Kaibabensis|Agave utahensis subsp. kaibabensis]]
+
|[[Agave utahensis subsp. kaibabensis|Agave utahensis subsp. Kaibabensis]]
 
|-id=key-0-1
 
|-id=key-0-1
 
|1
 
|1
 
|Leaves 1–3 cm wide; rosettes 1.5–4 dm wide; flowers 2.3–3.2 cm.
 
|Leaves 1–3 cm wide; rosettes 1.5–4 dm wide; flowers 2.3–3.2 cm.
|[[Agave utahensis subsp. Utahensis|Agave utahensis subsp. utahensis]]
+
|[[Agave utahensis subsp. utahensis|Agave utahensis subsp. Utahensis]]
 
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Revision as of 15:22, 10 June 2020

Plants acaulescent, suckering or not; rosettes solitary or sparingly cespitose, 1.5–6 × 1.5–10 dm. Leaves ascending, 12–50 × 1–5.5 cm; blade grayish green to yellowish green or green, without bud-prints, linear-lanceolate or lanceolate, stiff, adaxially plane or concave toward apex, abaxially convex toward base; margins straight or undulate, nonfiliferous, conspicuously armed, horny from distalmost teeth to apical spine, teeth single, 2–12(–15) mm, 1–4 cm apart, rarely absent; apical spine light gray to ivory white, acicular or subulate, 2–20 cm. Scape 1.7–5 m. Inflorescences spicate, racemose or narrowly paniculate, open to densely flowered; bracts caducous, narrowly triangular, 4–8 cm; lateral branches 50+, horizontal to slightly ascending, comprising distal 1/2–2/3 of inflorescence, shorter than 10 cm. Flowers 2–12 per cluster, erect, urceolate, 2.3–4.3 cm; perianth yellow, tube campanulate, 1–4 × 6.5–11.5 mm, limb lobes connivent, erect, subequal, 7–12 mm; stamens slightly exserted; filaments inserted at or 1–3 mm above base of perianth tube, erect, white, 1.3–2.4 cm; anthers pale yellow, 5–12 mm; ovary 1.2–2.9 cm, neck constricted, 3.5–8.5(–10) mm. Capsules pedicellate, oblong to ovoid, 1–2.5 cm, apex beaked. Seeds 2–4 mm.

Discussion

Subspecies 2 (2 in the flora).

Selected References

None.

Key

1 Leaves 3–5.5 cm wide; rosettes 4–10 dm wide; flowers (2.6–)2.9–4.3 cm. Agave utahensis subsp. Kaibabensis
1 Leaves 1–3 cm wide; rosettes 1.5–4 dm wide; flowers 2.3–3.2 cm. Agave utahensis subsp. Utahensis