Jepson eFlora: Taxon page
Vascular Plants of California
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Spiranthes romanzoffiana


Higher Taxonomy
Family: OrchidaceaeView DescriptionDichotomous Key
Common Name: ORCHID FAMILY
Habit: Perennial herb, terrestrial [growing on other pls], non-green (nutrition from association of roots with fungi) or green, generally from rhizomes or tubers with few to many fleshy to slender roots; cauline leaves +- reduced to sheathing stem bracts or not. Leaf: 1--many, basal to cauline, linear to +- round, alternate to opposite (if only 1 pair), generally sessile. Inflorescence: flowers 1--many, spike or raceme, bracted. Flower: bisexual, bilateral, in bud generally rotating 180° by twisting ovary (position of parts indicated after twisting); sepals generally 3, generally free, generally petal-like, uppermost generally erect, lateral with chin- or spur-like projection (mentum) or not; petals 3, 1 (lip) different, spurred or not; stamens generally 1 (3 in Cypripedium, 2 functional, 1 a staminode), fused with style, stigma into column, pollen generally lumped, generally removed as unit by insect; ovary inferior, 1-chambered, placentas 3, parietal, stigma 3 lobed, generally under column tip. Fruit: capsule. Seed: many, minute.
Genera In Family: +- 800 genera, +- 25000 species: especially tropics (worldwide except Antarctica). Many cultivated for ornamental, especially Cattleya, Cymbidium, Epidendrum, Oncidium, Paphiopedilum; Vanilla planifolia Andrews fruits used to flavor food. Note: Platanthera may be paraphyletic without inclusion of Piperia (Bateman et al. 2009 Ann Bot 104:431--445); study needed.
eFlora Treatment Author: Ronald A. Coleman, Dieter H. Wilken & William F. Jennings, except as noted
Scientific Editor: Ronald A. Coleman, Thomas J. Rosatti.
Genus: SpiranthesView DescriptionDichotomous Key


Common Name: LADIES TRESSES
Leaf: at flower 0 or +- basal. Inflorescence: spike, generally dense, flowers in spiral; bracts leaf-like, < to > flowers, gradually reduced upward, linear to oblong. Flower: sepals, lateral petals narrow-lanceolate; upper sepal +- fused to lateral petals, together hood-like, enclosing column, lower +- free, +- = lip, adherent to hood; lip not spurred, pouch-like, deeply grooved below middle, concave above; column < lip, tip with anther on back. Fruit: spreading to ascending.
Species In Genus: +- 40 species: especially America, also Japan, Australia, New Zealand. Etymology: (Greek: coiled flowers) Note: Plants in SN may be hybrids between species below, for which Spiranthes stellata P.M. Brown et al. might be correct.
Unabridged Note: Plants in SN may be hybrids between species below, for which Spiranthes stellata P.M. Brown, Dueck, & K.M. Cameron might be correct.
Unabridged Reference: Sheviak 1990 Rhodora 92:213--231
Spiranthes romanzoffiana Cham.
NATIVE
Habit: Plant 7--30 cm. Leaf: basal 3--13 cm. Inflorescence: 2--14 cm; flower bracts 6--14 mm. Flower: sepals, petals 8--12 mm; column 1.5--4 mm. Chromosomes: 2n=44,66,88.
Ecology: Wet meadows, freshwater marshes, seeps; Elevation: < 3300 m. Bioregional Distribution: NW, CaR, SN, CCo, SnFrB, SnBr, SnJt, MP; Distribution Outside California: to Alaska, northeastern North America, New Mexico; Europe. Flowering Time: May--Sep
Jepson eFlora Author: Ronald A. Coleman, Dieter H. Wilken & William F. Jennings
Unabridged Reference: Sheviak 1990 Rhodora 92:213--231
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Botanical illustration including Spiranthes romanzoffiana

botanical illustration including Spiranthes romanzoffiana

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Citation for this treatment: Ronald A. Coleman, Dieter H. Wilken & William F. Jennings 2012, Spiranthes romanzoffiana, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=45264, accessed on August 22, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on August 22, 2019.

Spiranthes romanzoffiana
click for enlargement
© 2016 Keir Morse
Spiranthes romanzoffiana
click for enlargement
© 2003 Steve Matson
Spiranthes romanzoffiana
click for enlargement
© 2016 Keir Morse
Spiranthes romanzoffiana
click for enlargement
© 2016 Keir Morse
Spiranthes romanzoffiana
click for enlargement
© 2016 Keir Morse
Spiranthes romanzoffiana
click for enlargement
© 2006 George W. Hartwell

More photos of Spiranthes romanzoffiana in CalPhotos



Geographic subdivisions for Spiranthes romanzoffiana:
NW, CaR, SN, CCo, SnFrB, SnBr, SnJt, MP
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

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Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.