198 DESCRIPTIONS OF THE SHRUBS 



lobed. The fruit is a dry liemispheric capsule above a 4-lobed broadly 

 spreading calyx ; this, when ripe, splits into 4 valves and has many seeds. 

 The number of species (80) and especially the increasing number of hy- 

 brids render the forms difficult to distinguish. About all of the species 

 are fully hardy North. It is unfortunate that the name Syringa was given 

 by Linnaeus to the lilacs. This has led to confusion between botanists 

 and the people for 150 years. The public still use the name Syringa for 

 these white-flowered shrubs. 



The smallest species, 3 feet, Small-leaved Syringa, Philadelphus 

 microphyllus, has entire-edged leaves (|-1 inch long) and deliciously 

 fragrant flowers (1 inch) in clusters of 1 to 3. The commonest species. 

 Mock Orange or Svringa — Philadelphus coron^rius — grows to the 

 height of 10 feet with upright branches having clusters of 5 to 9 creamy- 

 white very fragrant flowers. The most showy of all, Lemoine's Syrin- 

 ga — Philadelphus Lem6inei, — is a hybrid with abundant sweet-scented 

 pure white flowers ; the tips of the branches are arching. 



[Twig cuttings ; layers ; seeds.] 



KEY TO THE SPECIES OF MOCK OEANGES 



* Bark of old branches peeling off in thin brown flakes. (A.) 



A. Flowers creamy-white, very sweet-scented, in large 5-9-flowered 

 dense clusters ; leaves denticulate, usually pointed at both ends, 

 slightly hairy below (2-4 inches long). Mock Orange or 

 Syringa — Philadelphus coron^rius. This includes varieties with 

 yellow foliage, Golden Syringa (306) — aureus ; white-edged 

 foliage — arg^nteo-marginMa ; narrow leaves — salicif61ia ; dwarf 

 form — n^nus ; and several double-flowered forms. 



A. Flowers pure white, slightly fragrant, 1 1 inches broad, usually 5 in 

 cluster, style longer than stamens ; spreading, with branches 

 arching; a hybrid. Zeyher's Syringa — Philadelphus Z^yheri. 



A. Flowers as in the last, but with the petals oblong, acute ; leaves 

 longer and more pointed. Falconer's Syringa (307) — Phila- 

 delphus Falconeri. 



A. Flowers small, yellowish-white, very fragrant, 3-7 in cluster 

 completely covering the plant ; leaves ^-2| inches long ; a hy- 

 brid with several varieties. Lemoine's Syringa — Philadelphus 

 Lem6inei. 



A. Flowers large on leafy branchlets with few, 1-3, rarely 5 

 together, slight but delightful fragrance, calyx lobes twice as long 

 as tube. Large shrub with recurved branches. Large-flovvkred 

 Syringa (308) — Philadelphus grandiflorus. 



