190 JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



Korea: prov. Kogrn, planted, grounds of Yutenji Monastery, Kon^^o-san, alt. 

 500 m., July 7, 1918, E. IL Wilson (No. 10,508 type); Makucn-an Monastery, 

 Kongo-san planted, October 11, 1917, E. H. Wilson (No. 9287). 



This form is characterized by its unusually large, clear green cones. 

 Two Irces arc planted in the grounds of the Yut on ji Monastery and one in 

 those of the ]\Likaen-an Monastery on tlie Kongo-san (Diamond Mts.). 

 I could not find out their origin but they must liave been brought from 

 northern Korea since the Larch grows in Korea on tlic volcanic soils of the 

 north oidy. In the extreme north the typical L, dahurica Turcz. is found, 

 but must of the Larch in Korea is referable to the large-coned variety, 

 PrincipU-Rupprcchtii Rehd. & Wils. The cone of this variety is exceed- 

 ingly varial)lc in size even on the same branch, and individual trees bearing 

 preen and reddish cones are occasionally found. But I did not see wild 

 trees with such uniformly large, green cones as those here described. I 

 gathered seeds in 1918 and plants are now growing in the Arnold Arboretum. 



TETRAPLASIA, A NEW GENUS OF RUBIACEAE 



Alfred Reudeh 



Flores tctrameri, hermaphroditi; calyx late campanulatus, ovario ad- 

 natus, lobis brevibus latisque erectis; corolla infundibuliformis, extus 

 glabra, tubo intus praesertim ad faucem piloso, lobis o vat is valvatis; sta- 

 mina inclusa, 4, filamentis brevibus paulo supra medium tubi afSxis, an- 

 theris oblongis dorsifixis; stylus apicc 4-fidus, stigmatibus filiformibus recur- 

 vis; ovarimn Inferum, 4-loculare, loculis uni-ovidalis, ovulis pendcutibus. 

 Fructus drupaccus, bacciformis, carnosus; put amen subglosum, crustaceum, 

 monospcrmum; semen majusculum, subglobosum, endospermate coi)ioso; 

 embryo parvus, rectus, cotyledonibus brevibus latis. — Frutex glaber, 

 foliis ellipti(ns coriaceis, stipulis Intrapetiohiribus, florlbus parvis In cyniis 

 bifloris tcrminalibus et axillaribus, fructu bacciformi rubro. 

 Si)ecics imica in insulis Liukiu dictis. 



This new genus apparently belongs to the tribe Vangucrieac which is 

 characterized by uni-ovuhite locules of the ovary, pendent ovules, valvate 

 corolladobcs, stamens inserted near the mouth, drupaceous fruit and copi- 

 ous endosperm. Tetraplasia^ seems most closely related to Plectronia and 

 Vanguoria from which it differs chiefly in the 4-parted stjde, the 4-celled 

 ovary and in the sn:iall, 2-flowered inflorescence. 



Tetraplasia biflora, sp. nov. 



Frutex 2-3-mctralis, glaber, ramis dichotomis, junloribus quadrangulari- 



bus viridil)us, vetustioribus flavo-griseis teretibus. Folia crasse corif 



elliptica, utrinque acuta vel apice leviter acuminata, margine vix vel leviter 

 recurva, 510 cm, longa et 2-5.5 cm. lata, supra lucidula, lacte viridia, sub- 



tus pallide viridia, costa media supra leviter impressa, subtus leviter elcvata, 



^ From Greek t er pa7r\da ws , fourfold, referring to the tcLrarncTou.s flowora. 



