1910] Hall: Studies in Ornamental Trees and Shrubs. 37 



These trees are not hardy, and although grown at San 

 Francisco will not endure a temperature much below the freezing 

 point. 



Several species of Callistemon are known in trade as Metro- 

 sideros. The so-called M. semperflorens and M. latifolius are 

 mostly Callistemon lanceolatus. M. speciosus is Callistemon spe- 

 ciosus. 



CALOTHAMNUS. 



Although often confused with Melaleuca, this genus is at 

 once distinguished by the anthers, which are erect and attached 

 by the very base to the summit of the filament. Our only 

 common species in cultivation is C. quadrifidus R. Br., of Aus- 

 tralia, a low shrub with cylindric, punctate leaves and clustered 

 crimson flowers with long stamens united into bundles. Its 

 uses and methods of propagation are similar to those given for 

 Callistemon. 



MISCELLANEOUS ORNAMENTALS. 



Lyonothamnus floribundus var. asplenifolius Brandegee. 



ISLAND IRONWOOD. 



An erect, evergreen tree, becoming 75 ft. high, with very heavy and 

 dark wood and a loose red bark which exfoliates in long ribbon-like 

 strips: leaves fern-like, opposite, stalked, mostly parted into several nar- 

 rowly oblong or lanceolate segments, each segment 3 or 4 in. long and 

 cut to near the midrib into many shield-shaped lobes (mostly simple and 

 nearly entire in typical L. floribundus), white-tomentose beneath or gla- 

 brous: flowers white, small, but the clusters dense and 4 to 8 in. across: 

 sepals and petals 5 each: stamens 15: pistils 2, distinct: seeds usually 4, 

 minute. Family Eosaceae. Santa Barbara Islands. Illustrations: Fig. 15; 

 pi. 7; Zoe, i, pi. 5; Sudworth, Forest Trees Pacif. Slope, figs. 154, 155; 

 Sargent, Silva, pi. 197; Sargent, Man. Trees N. A., fig. 275. - 



Lyonothamnus is, in many respects, the most remarkable 

 contribution that California has made to the world's list of 

 ornamental trees. It is known native only on Santa Cruz, Santa 

 Rosa, Santa Catalina, and San Clemente islands, and was first 

 brought to the mainland in 1894 by Dr. Franceschi, of Santa 

 Barbara. In that year one live stump and a quantity of seeds 

 were procured on Santa Cruz Island. The former was planted 

 on State street, Santa Barbara, where it produced a tree about 



