Show Lower Taxa
Xylorhiza tortifolia
Pittonia 3: 48. 1896.
IllustratedEndemic
Basionym: Haplopappus tortifolius Torrey & A. Gray Boston J. Nat. Hist. 5: 109. 1845 (as Aplopappus)
Synonyms: Machaeranthera tortifolia (Torrey & A. Gray) Cronquist & D. D. Keck
Subshrubs, 20–60 (–80) cm. Stems branched mostly in proximal 3/4, ± piloso-villous, stipitate-glandular. Leaf-blades lanceolate to elliptic-oblong or oblanceolate, 3–20 (–25) mm wide, bases often subclasping or sometimes attenuate and not clasping, margins flat, sharply spinulose-toothed, faces loosely villous or glabrous, stipitate-glandular. Peduncles 5–25 cm. Involucres 12–20 × 15–20 (–30) mm. Ray-florets (15–) 18–60 (–85); corollas usually lavender, seldom white. Style-branch appendages shorter than stigmatic lines.
Distribution
Ariz., Calif., Nev., Utah
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Key
| 1 | Stems, leaves, and involucres glabrous, stipitate-glandular; leaf margins sparsely piloso-villous to puberulent | Xylorhiza tortifolia var. imberbis |
| 1 | Stems, leaves, and involucres piloso-villous to puberulent, finely stipitate-glandular | Xylorhiza tortifolia var. tortifolia |
... more about "Xylorhiza tortifolia"
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
subclasping +
not clasping +
attenuate +
1-nerved +
linear;lanceolate or oblanceolate oblong or narrowly elliptic +
ribbed +
stigmatic +
barbellate +
tawny +
persistent +
30;45 +
unequal +
absent +
white +
lavender +
absent +
monomorphic +
4-ribbed +
dimorphic +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
indeterminate +
surrounding +
campanulate;hemispheric +
lanceolate;elliptic-oblong or oblanceolate +
3mm;20mm +
alternate +
cauline +
spreading +
triangular +
spinulose-toothed +
scarious +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
distinct +
falling +
lanceolate +
unequal +
Pittonia +
1896 +
pistillate +
absent +
fertile +
epaleate +
pitted +
concave;usually flat;conic +
fibrous +
exalbuminous +
modifed +
2;3 +
alternate +
branched +
erect +
lanceolate +
2-branched +
glabrous +
Xylorhiza tortifolia +
Xylorhiza +
species +
shorter +
shorter to longer +
perennial +
subshrub +