LEUC/ENA 



LEUCOPHYLLUM 



907 



Mexico, Guatemala, Peru, and Pacific islands, but L. 

 glauca is found in the tropics of both worlds. It grows 

 wild in the West Indies and in western Texas. The trees 

 and shrubs of this genus have the habit of Acacia, but 

 belong to the Mimosa tribe, which is characterized by 

 stamens 10 or less. Generic characters are : calyx 5-den- 

 tate : stamens 10, not glandular: pod broadly linear, 

 stalked, flat-compressed, chartaceous, 2-valved : seeds 

 compressed. Acacia trichodes is L. trichodes, Benth., 

 but it is not in the trade. 



glauca, Benth. (Acacia f rondos a, W Hid. A. glauca, 

 Moench). Spineless: branches and petioles powdery: 

 pinnfe 4-8-paired; Ifts. 10-20-paired, oblong linear, glau- 

 cous below: pod 5-6 in. long. 



LEUCHTENBERGIA (after Prince Leuchtenberg). 

 Cactdcece. AGAVE CACTUS. Stems in age forming a trunk 

 2 in. ormoreindiam., by the shedding of the lower tuber- 

 cles : tubercles triangular-acuminate, spreading, 2-4 in. 



1269. Leuchtenbergia principis (X %). 

 (Adapted from Botanical Magazine.) 



long, Yz-% in. wide, with twisted papery spines : fls. fun- 

 nelform, widely expanded, borne near the apex of young 

 tubercles: fr. gray, ovate-elliptical, 1 in. long, covered 

 with scales and crowned by the persistent flower: seeds 

 dark brown, minutely tuberculate. Only 1 species, 

 closely related to Echinocactus, but of remarkably differ- 

 ent form. The plant is readily grown in the manner of 

 Echinocactus and Mamillaria. 



principis, Hook. & Fisch. Fig. 1269. Radial spines 

 6-8, the central one usually solitary, longer, sometimes 

 8 in. long: fls. yellow. B.M. 4393. A.G. 11:464. 



KATHARINE BRANDEGEE. 



LEUCOCKlNUM (Greek, white lily). Liliacece. SAND 

 LILY of Colorado. A hardy bulbous plant growing a few 

 inches high, with narrow foliage and clusters of pure 

 white, fragrant fls. borne just above the ground in early 

 spring. The fls. are funnel-shaped, having a slender 

 tube 2-4 in. long, the greater portion of which is below 

 the surface of the soil, and 6 lobes, each %-l% in. long. 

 They are borne in clusters of 4-many fls., and maintain a 

 succession for several weeks. They should be desirable 



for edging walks and bulb beds. They have a deep-seated 

 rhizome and fleshy roots. The bulbs are procurable 

 from Colorado and California, either as collected or nur- 

 sery-grown stock. The genus has only one species. It 

 belongs to an anomalous group, characterized by almost 

 total lack of stem and fls. solitary or clustered among 

 the radical Ivs. From the other members of this group 

 it is distinguished by the Ivs. not 2-ranked, and an in- 

 definite number of ovules in each locule. Perianth seg- 

 ments narrowly lanceolate, persistent: stamens 6: style 

 persistent, slightly 3-lobed. 



montanum, Nutt. SAND LILY of Colorado. Lvs. 8-12 or 

 more, flat, rather thick, 4-8 in. long, 1-3 lines wide: 

 pedicels %-l% in. long. j. H CowEN . 



LEUCOJUM (name explained below). Also written 

 Leucoium. Amary llidacece . SNOWFLAKE. The Snow- 

 flakes are hardy bulbous plants growing a foot or less 

 high and bearing dainty, nodding, 6-parted fls., which 

 are white, tipped with green, yellow, or a tinge of red. 

 They are less popular than Snowdrops (Galanthus), to 

 which they are closely related, and have larger fls., with 

 all the segments of equal size. There are 8 species, na- 

 tives of Europe and the Mediterranean region, 4 of which 

 are cult. Perianth-tube none; segments ovate or oblong. 

 Baker, Handbook of the Amaryllidese, 1888. The name 

 Leucojum was given by Linnaeus, but he did not explain 

 the application. The old Greek name, Leucoion,ws.s given 

 by Theophrastus to a plant now supposed to be a cruci- 

 fer, like some stock or wallflower. Leucoion is from 

 leukos, shining, white, and ion, violet. Snowflakes ap- 

 pear about the same time as white violets, and some- 

 times have a delicate odor, resembling that of the violet, 

 but the form of the fls. is very different. For culture, 

 see Bulbs. 



A. Blooming in March. 



vernum, Linn. SPRING SNOWFLAKE. Bulb globose, 

 54-1 in. in diameter: Ivs. strap-shaped, finally 6-9 in. 

 long, 4-6 lines wide: scape %-l ft. long, usually 1-fld.: 

 perianth segments white, tipped green : seeds with a 

 pale, membranous coat and conspicuous strophiole. 

 Central Eu., France to Bosnia and Tyrol. B.M. 46. G.C. 



II. 11: 399; 21: 341; 23:341. P.G.5:47. Gn. 25, p. 335, and 

 29, p. 607. V. 8:69. Var. Carpathicum, Herb., has 

 perianth segments tipped yellow. B. M. 1993. J. H. 



III. 32: 169. G.M. 39: 105. A choice form, usually bear- 

 ing 2-4 fls. 



AA. Blooming in April and May. 



sestivum, Linn. SUMMER SNOWFLAKE. Bulb ovoid, 

 1-1% in. in diameter: Ivs. strap-shaped, 1-1% ft. long: 

 scape 1 ft. long, 4-8-fld. : perianth segments white, 

 tipped green: seeds with a black, hard-shelled coat and 

 no strophiole. Blooms end of April and beginning of 

 May. Central and S. Eu. Mn.9:45. P.G.1:7. V. 3:342 

 and 8:70. 



pulch611um, Salisb., differs from L. cnstivum by its 

 smaller fls. and capsule, narrower Ivs. and fls. afortnight 

 earlier. Sardinia and Balearic Isles. 



AAA. Blooming in autumn. 



autumnale, Linn. (Acis atitumndlis, Salisb.). AU- 

 TUMN SNOWFLAKE. Bulb globose, % in. in diameter: Ivs. 

 thread-like, usually produced after the fls.: scape very 

 slender, 3-9 in. lone, 1-3-fld. : perianth segments white, 

 tinged with red: stamens half as long as segments. 

 Portugal and Morocco to Ionian Islands. B.M. 960.- 

 Not satisfactory everywhere. 



rdseum, Martin. Bulb globose, %-% in. in diam.: 

 peduncle shorter and usually 1-fld. : perianth segments 

 % in. long, rose-red, oblanceolate : stamens % in. long. 

 Corsica. -Usually difficult to grow, and little known 

 horticulturally. j. N. GERARD and W. M. 



LEUCOPHtXLUM (Greek, white leaf). Scrophularid- 

 cew. This includes a rare shrub from southern Texas, 

 the leaves of which are covered beneath with silvery 

 white wool. It has showy violet-purple, bell-shaped fls. 

 an inch across, borne in spring. In cultivation it flowered 

 for the first time in 1890, at Augusta, Ga., with P. J. 

 Berckmans. It is now cult, in S Fla.. and deserves cul- 

 tivation everywhere in the South. According to C. S. 

 Sargent, "There is no shrub of the desert portions of 



