Leaves: Leaves come in two types: cauline or basal[2][3][4][6] (radical).[7] One long basal leaf is present during blooming, along with several cauline leaves, and foliaceous bracts below the flowers.[3]
Basal/radical leaves: Basal leaves measure 20–[6] 30–[2][3][4] 50–[6] 70cm in length,[2][3][4] 1–5cm in width,[4] and are lax, shiny,[3] and persistent.[2]
Cauline leaves: 2-6 laceolate to linear leaves, measuring 5–[2][4][6] 15[6]–25cm in length.[2][4]
Inflorescences: Flowers are borne in groups of 1-[3] 2-[2] many.[2][3] Bracts are generally paired, lanceolate, and measure 1–5cm in length.[2]
Though the flowers of C. albus may occasionally be flushed pink, those which are deep rose in colour and are found from the southwest San Francisco Bay to outer south coast ranges may be assignable to C. albus var. rubellus, if recognized taxonomically.[2]
Perianth is oblong[2][6] and is typically closed at the tip.[2][3]
Sepals: Three[6] ovate[2] to lanceolate[2][7] sepals measuring 1-1.5cm long,[2][4] appressed to the petals,[2][3] rarely recurved. Sepals may be white, green,[3] greenish-white,[6] or rosy red, and are shorter than the petals.[3]
Petals: Three[6] elliptic[2][4] or wider[4] petals, with the insides being sparsely[2][3] ciliate (having a fringe of hairs),[2][3][4] with yellowish,[3] slender hairs[2][3][4] above the nectary[2][3] or along the gland.[4] Satiny[3][6] petals measure 2-2.5cm long,[2][4][6] overlap slightly, are closed at the tip, and may have a green, copper, pink,[3] lavender,[7] or purple[6] tinge on the outside of the flower, typically near the base of the petals and around the protruding glandular area.[3]
Nectary: Crescent-shaped,[2][3] shallowly to deeply[3] depressed,[2][3] with several[2][4] transverse,[4] fringed membranes[2][3][4] with white or yellow glandular hairs measuring 1/3-2/3 of the width of the petals.[2]
Stamens: Short, oblong, abruptly tipped, white to light pink stamens measuring 4mm in length.[2]
Filaments: 4 – 5mm in length, dilated at the base.[2]
Anthers: White to cream, oblong and obtuse,[3] measuring 4mm in length.[4]
Widespread in shady[2][3][4][5][6] to open[2][5][6] woods and scrub,[2][3][4][5][6] partially shaded grasslands, exposed coastal bluffs,[3] and is often found in rocky places.[3][4] May be found in many plant communities[2][3][4][5] below 5,000ft[4][5] or 2,000m,[2][3] including foothill woodlands, yellow pine forests,[4] and chaparral.[2][3][4][5]
Soil: Adaptable, but prefers well-drained soil.[3][5]
Water: Drought tolerant to moderate.[5] During its dormant period, this species receives little or no rain in the wild. In cultivation, give a regular supply of water in the growing season, then the bulbs need to dry when the leaves begin to yellow. Premature autumn growth and poor drainage are often the causes of bulb loss.[3]
Zone: Hardy to -18°C, and possibly as low as -23°C. USDA zones 9-10.[3]
Propagation
This species grows from seed only; no bulbils or offsets are formed.[3] Seeds require no treatment to aid germination.[8] When grown from seed, C. albus may be expected to bloom in the 3rd or 4th year.[3]
Albus comes from Latin, and means 'white' or 'bright'. Calochortus is derived from Greek meaning 'beautiful grass', a reference to the characteristic grass-like foliage of the genus.[11]
Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, editors. 2012. "The Jepson Manual: vascular plants of California", second edition. University of California press, Berkeley. ISBN9780520253124. pp 1380
Gerritsen, Mary E. and Ron Parsons, 2007. "Calochortus: Mariposa lilies and their relatives", Timber Press. ISBN9780881928440. pp 47-51
Munz, Philip A. "A Flora of Southern California", copyright University of California Press, Ltd. 1974. ISBN0520021460. pp 920-923
Carol Bornstein, David Fross, Bart O'Brien 2007. "California Native Plants for the Garden", Cachuma Press. ISBN0962850586 (paperback) ISBN0962850594 (hardcover). pp 211-212
Spellenberg, Richard. "National Audubon Society Field Guide to Wildflowers: Western Region" copyright 2001 Chanticleer Press, Inc. Punlished by Alfred A. Knopf, a division of Random House, Inc. First published 1979, second edition published 2001, eighth printing 2010. ISBN0375402330 pp 575-576
Parsons, Mary Elizabeth "The Wild Flowers of California", illustrated by Margaret Warriner Buck. Published by Cunningham, Curtiss & Welch, San Francisco 1912. Copyright William Doxey 1897, copyright Mary Elizabeth Parsons 1902, 1906. (no ISBN for this edition) pp 56-57
Emery, Dara E. "Seed Propagation of Native California Plants", 6th edition (printed 2011). Copyright 1988 Santa Barbara Botanic Garden. ISBN0916436039. pp 43
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