The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Columbia onion, Columbian onion

Bolander's onion

Bulbs

1–5+, not clustered on stout, primary rhizome, ovoid, 1–1.5 × 0.8–1.4 cm;

outer bulb coats brownish or grayish, enclosing 1 or more bulbs, membranous, lacking cellular reticulation or cells arranged in only 2–3 rows distal to roots, ± quadrate, without fibers;

inner coats white to pink, cells obscure, ± quadrate.

1–6+, not basally clustered, replaced annually by new bulbs borne terminally on rhizomes;

rhizomes 1–3, inconspicuous, slender, less than 2 cm including renewal bulb;

parent bulbs disappearing by anthesis except for still-functional roots and bulb coat, oblique-ovoid to ± oblong, 0.7–1.4 × 0.5–1.2 cm;

outer coats not enclosing bulbs, brown to gray-brown, ± obscurely reticulate, membranous, reticulum delicate, cells transversely elongate, V-shaped or ± wavy, forming obscure herringbone pattern, without fibers;

inner coats white, cells obscure, quadrate to ± rectangular, often contorted.

Leaves

usually persistent, green at anthesis, 2, basally sheathing, sheaths not extending much above soil surface;

blade solid, flat, broadly channeled, ± falcate, 10–35 cm × (2–)5–8 mm, margins entire.

persistent, withering from tip at anthesis, 2–3, basally sheathing, sheaths not extending much above soil surface;

blade solid, subterete to ± channeled, 9–30 cm × 1–2 mm, margins entire.

Scape

persistent, solitary, erect, solid, terete, enlarged proximal to inflorescence, (10–)20–30(–40) cm × 1.5–4 mm.

persistent, solitary, erect, solid, terete, 10–35 cm × 1–3 mm.

Umbel

persistent, erect, compact, 25–50-flowered, hemispheric to globose, bulbils unknown;

spathe bracts persistent, 3, 5–7-veined, ovate, ± equal, apex acute.

persistent, erect, compact to loose, 10–20-flowered, hemispheric, bulbils unknown;

spathe bracts persistent, 2, 4–6-veined, lanceolate to lance-ovate, ± equal, apex acuminate.

Flowers

± stellate, (6–)7–8(–10) mm;

tepals spreading, light pink to purple with prominent green midribs, narrowly lanceolate, ± equal, becoming papery in fruit, margins entire, apex acuminate;

stamens equaling or longer than tepals;

anthers blue-gray;

pollen light blue to gray;

ovary crested;

processes 6, 2 per lobe, low, rounded, margins entire;

style exserted, linear;

stigma capitate, scarcely thickened, unlobed;

pedicel 10–20 mm.

conic to campanulate, 7–14 mm;

tepals erect, reddish purple, rarely white, narrowly lanceolate to lance-ovate, ± equal, becoming rigid and carinate in fruit, margins finely denticulate (inner tepal more prominently so), apex acute to obtuse, becoming involute at tip and appearing acuminate;

stamens included;

anthers yellow;

pollen yellow;

ovary crested;

processes 3, central, 2-lobed, minute, margins entire;

style linear, equaling stamens;

stigma capitate, obscurely 3-lobed, scarcely thickened;

pedicel 10–20 mm.

Seed

coat shining;

cells smooth.

coat dull;

cells minutely roughened.

2n

= 14.

Allium columbianum

Allium bolanderi

Phenology Flowering May–Jul.
Habitat Winter-wet, shallow soils on rock outcrops, or wet meadows
Elevation 300–1100 m (1000–3600 ft)
Distribution
from FNA
ID; MT; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

The varieties of Allium bolanderi are extremely difficult to distinguish in the absence of bulb material. Care must be taken to obtain good bulb material whenever collecting Allium, but it is extremely critical in this species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Bulbs oblique-ovoid; bulb coat breaking with serrate edges; flowers 7–12 mm; tepals lance-ovate.
var. bolanderi
1. Bulbs oblique-oblong, irregular, suggesting small tubers; bulb coat breaking with irregular edge; flowers 9–14 mm; tepals narrowly lanceolate.
var. mirabile
Source FNA vol. 26. FNA vol. 26, p. 259.
Parent taxa Liliaceae > Allium Liliaceae > Allium
Sibling taxa
A. aaseae, A. abramsii, A. acuminatum, A. ampeloprasum, A. amplectens, A. anceps, A. atrorubens, A. bigelovii, A. bisceptrum, A. bolanderi, A. brandegeei, A. brevistylum, A. burlewii, A. campanulatum, A. canadense, A. cepa, A. cernuum, A. constrictum, A. coryi, A. cratericola, A. crenulatum, A. crispum, A. cuthbertii, A. denticulatum, A. diabolense, A. dichlamydeum, A. dictuon, A. douglasii, A. drummondii, A. elmendorfii, A. falcifolium, A. fibrillum, A. fimbriatum, A. fistulosum, A. geyeri, A. gooddingii, A. haematochiton, A. hickmanii, A. hoffmanii, A. howellii, A. hyalinum, A. jepsonii, A. kunthii, A. lacunosum, A. lemmonii, A. macropetalum, A. macrum, A. madidum, A. membranaceum, A. monticola, A. munzii, A. neapolitanum, A. nevadense, A. nevii, A. nigrum, A. obtusum, A. oleraceum, A. paniculatum, A. parishii, A. parryi, A. parvum, A. passeyi, A. peninsulare, A. perdulce, A. platycaule, A. plummerae, A. praecox, A. punctum, A. rhizomatum, A. robinsonii, A. rotundum, A. runyonii, A. sanbornii, A. sativum, A. schoenoprasum, A. scilloides, A. serra, A. sharsmithiae, A. shevockii, A. simillimum, A. siskiyouense, A. speculae, A. stellatum, A. textile, A. tolmiei, A. tribracteatum, A. tricoccum, A. triquetrum, A. tuberosum, A. tuolumnense, A. unifolium, A. validum, A. victorialis, A. vineale, A. yosemitense
A. aaseae, A. abramsii, A. acuminatum, A. ampeloprasum, A. amplectens, A. anceps, A. atrorubens, A. bigelovii, A. bisceptrum, A. brandegeei, A. brevistylum, A. burlewii, A. campanulatum, A. canadense, A. cepa, A. cernuum, A. columbianum, A. constrictum, A. coryi, A. cratericola, A. crenulatum, A. crispum, A. cuthbertii, A. denticulatum, A. diabolense, A. dichlamydeum, A. dictuon, A. douglasii, A. drummondii, A. elmendorfii, A. falcifolium, A. fibrillum, A. fimbriatum, A. fistulosum, A. geyeri, A. gooddingii, A. haematochiton, A. hickmanii, A. hoffmanii, A. howellii, A. hyalinum, A. jepsonii, A. kunthii, A. lacunosum, A. lemmonii, A. macropetalum, A. macrum, A. madidum, A. membranaceum, A. monticola, A. munzii, A. neapolitanum, A. nevadense, A. nevii, A. nigrum, A. obtusum, A. oleraceum, A. paniculatum, A. parishii, A. parryi, A. parvum, A. passeyi, A. peninsulare, A. perdulce, A. platycaule, A. plummerae, A. praecox, A. punctum, A. rhizomatum, A. robinsonii, A. rotundum, A. runyonii, A. sanbornii, A. sativum, A. schoenoprasum, A. scilloides, A. serra, A. sharsmithiae, A. shevockii, A. simillimum, A. siskiyouense, A. speculae, A. stellatum, A. textile, A. tolmiei, A. tribracteatum, A. tricoccum, A. triquetrum, A. tuberosum, A. tuolumnense, A. unifolium, A. validum, A. victorialis, A. vineale, A. yosemitense
Subordinate taxa
A. bolanderi var. bolanderi, A. bolanderi var. mirabile
Synonyms A. douglasii var. columbianum
Name authority (Ownbey & Mingrone) P. M. Peterson: Syst. Bot. 13: 211. (1988) S. Watson: Proc. Amer. Acad. Arts 14: 229. (1879)
Web links