19221 REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 221 



JR. Alaternus f. aureo-varicgata Duraont de Courset (I. c, as var. — Rhamnus 

 Alaternus communis 2. aureo-variegatus Weston, 1. c.) with yellow-margined 

 leaves is also figured by Schmidt on the same plate (lower figure). 



xCeanothus pallidus Lindley in Bot.Reg. xxvi. t. 20 (1840). — K. Brand- 

 egee in Proc. Calif. Acad. ser. 2, iv. 214 (1894). (? C. Delilianus 1 X ovatus 

 = C. americanus X coeruleus 2 X ovatus). — C. Fontanesianus y cyanens 

 Spach, Hist. Veg. n. 460 (1834).- — C. ovatus 2. flore cyaneo H. Bollw. apud 

 Kirchner in Petzold & Kirchner, Arb. Muse. 347 (1864) —C. oralis X 



TU8 Koehne, Deutsch. Dendr. 396 (1893).— Schneider, 111. Handb. 



thyrsiflorus Koehne, Deutsch. Dendr. 396 (1893).— 



Laubholzk. n. 292 (1909). —C. hybridus pallidus Rehder in Bailey, Stand. 



Cycl. Hort. n. 696 (1914). — C. intermedium Hort. ex Koehne, 1. c. (1893), 



as synon. 



For this plant which is apparently of hybrid origin, the parentage C. 

 ovatus X thyrsiflorus has been suggested by Koehne and by Schneider, 

 but I am unable to see any influence of C. thyrsiflorus Eschsch. 

 There is no trace of the peculiar angular branches, of the rigid habit, the 

 leathery leaves, the short pedicels and of other characters of that species 

 perceptible in this plant, and, moreover, w r hen this plant first appeared, 

 (1. thyrsiflorus was not yet introduced. There can be little doubt that C. 

 pallidus Lindley is the same a Spach 's C. Fontanesianus cyanens, as Lind- 

 ley states that his plant was received from Messrs. Baumanns of Boll- 

 viller under the name of C. ovaius and Spach says that his var. cyanens 

 was raised like the following variety by the Baumanns from seed of his 

 C. Fontanesianus (C. ovatus Desf.). 



1 XCeanothus Delilianus Spach, Hist. Veg. n. 459 (1834). — K. Brandegee in Proc. Calif. 

 Acad. Sci. ser. 2, iv. 213 (1894). (C americanns X coeruleus.) — C. americanus var. floribus 

 subcoc ruleis Godefroy in Ann. Soc. Hort. Paris, v. 302 (1829). — C. pulchellus Delile in Hort. 

 Monsp. ex Spach, 1. c. (1834), as synon. — C. Arnouldii Carriere in Rev. Hort. 1872, 380. 

 C. azureus Lavallee, Arb. Segrez. 51 (1877), in part, not Desfontaines. — C. azureus var. 

 Arnoldii Lavallee 1. c. (1877). — C. americanus X azureus (C. Arnouldii h.) Koehne, Deutsch 

 Dendr. 395 (1893).— Schneider, III. Handb. Laubholzk. n. 294 (1909).— C. Dillenianus 

 Marchais in Rev. Hort. 1895, 351. — C. hybridus Hort. apud Rehder in Bailey, Cycl. Am. 



Hort. i. 205 (1900), in part.— C. hybridus "Arnoldii" Rehder, 1. c. (1900).— C. versaillensis 

 Schneider, 111. Handb. Laubholzk. ir. 294. (1909). 



Judging from Spach 's description I have no doubt that his statement that this plant is 

 probably a hybrid of C. azureus is correct, and C. americanus is apparently the only species 

 which could be the other parent. Therefore C. Delilianus will be the oldest binomial for the 

 numerous hybrids raised between C. coeruleus Lag. (C. azureus Desf.) and C. americanus, 

 of which may be cited as well known garden forms "Gloire de Versailles/' "Leon Simon." 

 44 Sceptre d'azur," and 4< Le Geant." 



2 Ceanothus coeruleus Lagasca, Gen. & Spec. 11 (1816). — Loddiges, Bot. Cab. n. t. 110 



(1821). — C. azureus Desfontaines, Tabl. Ecole Bot. ed. 2, 232 (1815), nomen nudum. — Ker 



in Bot. Reg. iv. t. 291 (1818).— K. Brandegee in Proc. Calif. Acad. Sci. ser. 2, iv. 193 (1894). 



C. bicolor Humboldt & Bonpland apud Willdenow msc. in Roemer & Schultes, Syst. v. 300 

 (1819). 



As pointed out already by Mrs. K. Brandegee (I. c.) the oldest valid name for this species 

 is C. coeruleus Lag., as C. azureus Desf. published one year earlier is a nomen nudum. 



