By Jane McGary, North American Rock Garden Society

North the US is domestic to nearly 4 dozen bulbous genera. between those are a few highly regarded rock backyard vegetation, corresponding to Calochortus, Erythronium, and Fritillaria, that have by no means had something mammoth written approximately them in e-book shape. Others, together with Calydorea, Hypoxis, and Muilla, are usually not besides recognized outdoor professional collections. The features that make bulbs so fascinating in gardens comprise their nice variety of flowering time, colour, dimension, and shape; their skill to conform to a variety of environments; and their ability to multiply and unfold with no gardener's intervention. novice botanists and horticulturists, really people with an curiosity in alpine and rock gardens, and tourists making plans a box journey to selection plant-viewing websites everywhere in the continent, can be encouraged through this firsthand account of local North American bulbs. greater than a hundred outstanding colour pictures illustrate the eleven unique chapters.

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The flowers, atop 30-centimeter stems, are mildly fragrant. Thad Howard (1954) reports a second race of this species, overlooked by Ownbey, that is 34 The Genus Allium much more robust, with larger, many-flowered (20 to 40) umbels and a sweet fragrance. Allium ecristatum is reportedly as good a garden plant as A. texanum and A. eulae. Allium hyacinthoides Bush Allium hyacinthoides (synonym A. canadense var. hyacinthoides) has a narrow distribution in the prairies of north central Texas and nearby Oklahoma, generally on sandy soils.

Florosum is a name proposed by Thad Howard, but not yet published, for a floriferous form he found in several locations growing among large populations of typically bulbiliferous A. canadense in north central Texas. Though perhaps regarded as a forma at most (or simply under a cultivar name, for example, 'White Queen', proposed by Howard), it deserves recognition and segregation from A. canadense. 5-centimeter wide hemispherical heads. Some bloom heads lack bulbils altogether, and others have only three to eight small bulbils, inconspicuously sessile in the center of the umbel.

Californicum, A. durangoense, A. eurotophilum, A. fantasmosense, A. glandulosum (sensu Howard), A. guatemalense, A. huntiae, A. kunthii (sensu Howard), A. mannii, A. melliferum, A. mexicanum, A. michoacanum, A. ownbeyi, A. potosiense, A. pueblanum, A. stoloniferum, A. telaponense, A. traubii, and A. traubii f. liberflorens. My only experience growing Mexican alliums is with Allium traubii, a fall bloomer. Each bulb has several channeled, gray-green, minutely scabrid (rough) leaves which appear in late summer.

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