1923J SCHNEIDER, NOTES ON HYBRID BERBERIS 207 



satis obtusa, basi sensim in petiolum subnullum vel ad 6 mm. longum 

 attenuata, margine satis indistincte brevissime subdistanter denticulato- 

 serrata vel subintegerrima, minimis exceptis 1.5 : 0.5 ad 2.8 : 1.3 cm. 

 petiolo excluso magna, superne satis viridia, subtus discoloria, laete viridia 

 vel cinerascentia, utrinque indistincte et laxe vel subanguste reticu- 

 lata (margines cellularum epidermidis utriusque faciei aequimagnarum, 

 subtus distinctius, undulatae); folia ramulos novellos fulcientia sur- 

 culorumque latiora, majora, obovato- vel ovato-elliptica, obtusiora, 

 basi subito in petiolum brevem contracta vel attenuata, distinctius 

 distanter serrata, ad 4.5 : 1.8 vel 4.5 : 2.2 cm. petiolo incluso magna 

 vel minora elliptica circiter 2.5 : 1.5 cm. magna. Inflorescentiae 

 racemosae vel subumbellato-racemosae, densiflorae, interdum fere ad 

 mediam nudae vel floribus basi incipientibus, pendentes, apice ramu- 

 lorum versus saepe fasciculato-racemosae, 8- ad circiter 15-florae; pedi- 

 celli graciles, (3-)4-6 (infimi ad 8) mm. longae, bracteis anguste lan- 

 ceolatis, acuminatis ad 2.5 mm. longis vel ovato-lanceolatis acutis brevi- 

 oribus suffulti; flores Plutei, satis parvi, aperti circiter ad 6 mm. diameti- 

 entes; sepala externa ovato-lanceolata, parva, ut media late ovata illis 

 fere duplo majora, rubescentia, interna obovata vel obovato-oblonga, 

 circiter 5 mm. longa; petala obovato-oblonga, circiter 5.5 mm. longa, apice 

 emarginata, basi breviter unguiculata, glandulis 2 subparvis ovoideis 

 aurantiacis separatis praedita; stamina petalis circiter ^"/^ breviora, 

 apice truncata vel leviter subemarginata; ovarium late ellipticum, stigmate 

 sessili lato, ovulis (l-)2 sessilibus instructum. Fructus obovato-elliptici 

 vel elliptici, Psanguinei, Ppruinosi, 7-8 : 4-5 mm. magni, estylares; semen 

 1, dilute purpureo-brunneum, sublaeve, circiter 5 mm. longum. 



I believe that I am quite right in assuming that B. durobrivensis is a 

 hybrid between B. canadensis and B. Poiretii. I received several forms 

 of it from the Highland Park at Rochester, N. Y. One, numbered 12, 

 was sent in flower collected on June 8, 1908; fruiting branches were sent 

 September 18, 1906 and September 8, 1916. It was called B. macracantha, 

 and had ovate-lanceolate acute bracts like those of B. canadensis. The 

 other (no. 19) consisted of fruiting specimens collected September 18, 

 1906 and October 11, 1916, and named B. sinensis, with lanceolate 

 acuminate bracts like those of B. Poiretii. The form has nothing to do 

 with either the true B. macracantka or B. chinensis. 



Of B. canadensis I want to give a precise description and to add a few 

 words as to its synonymy and history. 



Berberis canadensis Miller, Gard. Diet. ed. 8, no. 3 (1768). — Miinch- 

 hausen, Hausvater, v. 112 (1770). — J. S. Kerner, Darstell. Ausl. Baume, 



2,t. 15 (1796). 



Berberis dumetorum, latissimo folio Herman, Par. Bot. Prodr. in Simon 



Warton, Schola Bot. 317 (1689). 

 Berberis, latissimo folio; canadensis H. R. Par. in Simon Warton, 1. c. 289. 



