CORRECTIONS AND ADDITIONS TO VOLUME II 453 
sparse setosis exceptis glaber, foliis petiolatis ellipticis v. oblongis trinerviis saepe 
inaequalibus, floribus terminalibus solitariis v. binis majusculis roseis. 
Species unica Chinae occidentalis incola. 
Genus novum Melastomacearum ad tribum Sonerileas referendum. Proximum 
videtur generibus Fordiophyto Stapf et Sonerilae Roxburgh sed antheris sub- 
aequalibus a priori et floribus tetrameris ab altero facile distinguitur. 
This new genus seems to be most closely related to Fordiophytum which differs 
chiefly in its unequal stamens, deciduous rather large sepals, in the ovary only 
partly adnate to the calyx, in the symmetrical petals and the more herbaceous 
habit. In its floral structure it seems nearest to Sonerila, but that genus is easily 
distinguished by its trimerous flowers and symmetrical petals. In its habit and 
general appearance the new genus resembles certain species of Monochaetum, like 
M. alpestre Naudin and M. Pringlei Rose, but that genus is otherwise entirely dif- 
ferent and belongs to a different tribe. In the shape of the petals Plagiopetalum 
resembles Carionia as they are figured by Naudin (in Ann. Sci. Nat. Bot. sér. 3, 
XV. t. 15, fig. 6 [1851]) except that the petals are broader at the base. 
PLAGIOPETALUM QUADRANGULUM Rehder, n. sp. 
Suffrutex 30-45 em. altus, dichotome patenti-ramosus, glaber; ramuli et rami 
graciles, anguste quadri-alati, alis in ramulis vetustioribus magis prominentibus et 
sul Folia membranacea, graciliter petiolata, anguste elliptica v. elliptico- 
oblonga, obtusiuscula v. obtuse breviter acuminata, basi angustata, adpresse 
crenulato-serrulata dentibus seta albida 0.5-1 mm. longa terminatis, 1.8-4.5 cm. 
longa et 0.7-1.5 em. lata, opposita saepe valde inaequalia, supra obscure coeruleo- 
viridia, inter nervos primarios utrinque serie setarum albidarum distantium in- 
structa, subtus paulo pallidiora glabra, trinervia, nervis primariis supra inconspicuis 
Subtus elevatis trabeculis 6—10 leviter elevatis conjunctis; petioli graciles, 3-8 mm. 
longi, supra canaliculati, marginati. Flores rosei, terminales, solitarii v. bini, 
circiter 2 em. diam.; pedicelli angulati, 3-5 mm. longi; calyx campanulatus, 4- 
angulatus, 8-nervius, 5 mm. longus, lobis 4 subulatis saepe inaequalibus 0.5-2 mm. 
longis longioribus pauci-serrulatis; petala quadrangulo-ovalia, inaequilateralia, 
10 mm. longa et circiter 6 mm. lata; stamina petala paulo superantia, antheris 
beige Subaequilongis paulo inaequalia filamentis filiformibus basin versus 
eviter dilatatis, rectis, antheris lineari-lanceolatis leviter curvatis eis staminum 
ngorum 5.5 mm. longis, staminum breviorum 4 mm. longis, connectivo stami- 
Fi longiorum postice paulo supra basin antherarum tuberculis 2 levibus con- 
uentibus notato, staminum breviorum ad basin antherarum tuberculis 2 levibus 
8 Metis notato; stylus stamina vix superans. Capsula campanulata, circiter 
MN longa; semina (immatura tantum visa) oblonga, basin versus paulo an- 
bes minute punctulata, 1-1.2 mm. longa. 
J estern Szech’uan: Hungya Hsien, sandstone cliffs, alt. 600-1000 m., 
une 9, 1908 (No. 3261; sub-shrub, 0.3-0.45 m. tall, flowers carmine red). à 
dad cordata, var. chinensis (p. 425). Strike out “Veitch Exped. No. 420” 
hs the following numbers: 
*stern Hupeh: Changyang Hsien, woods, alt. 1300-2000 m., 1907 (No. 
I H y . 
planta Pew only); Fang Hsien, woodlands, alt. 2000-2500 m., 1907 (No. 4444; 
Ww Pinus Henryana (p. 429). Add the following numbers: 
1436. (17? Hupeh: Changyang Hsien, woods, alt. 1300-2000 m., 1907 (No. 
plants erg only); Fang Hsien, woodlands, alt. 2000-2500 m., 1907 (No. 4443; 
