326 The Philippine Journal of Science ms 



This species of the section Tetramastixia is distinguished among the 

 few Philippine forms by its relatively large and thickly coriaceous leaves. 

 It is probably most closely allied to Mastixia tetrapetala Merr., but has 

 much larger, more numerously nerved leaves than that species, which, 

 moreover, are strictly alternate. It is less closely allied to M. premnoides 

 (Elm.) Hallier f., of Mindanao. 



GESNERIACEAE 



CYRTANDRA R. Brown 

 CYRTANDRA ALVAREZII sp. nov. 



Frutex, novellis densissime f errugineo-lanosis ; f oliis oppositis, 

 late oblanceolatis, usque ad 38 cm longis, breviter petiolatis, 

 apice acutis vel obscure acuminatis, basi longe angustatis, mar- 

 gine irregulariter dentatis, supra olivaceis, glabris, subtus sub- 

 dense ferrugineo-villosis, nervis utrinque circiter 18, curvato- 

 adscendentibus, distinctis; fructibus numerosis, oblongo-ellipsoi- 

 deis, glabris, circiter 1.5 cm longis, utrinque angustatis, brunneis, 

 umbellatis, umbellis distincte pedunculatis. 



A shrub, the branchlets and young leaves very densely lanate 

 with shining, appressed, ferruginous hairs, the ultimate branches 

 5 to 8 mm in diameter. Leaves opposite, subcoriaceous, appar- 

 ently in equal pairs, broadly oblong-oblanceolate, up to 38 cm 

 long and 12 cm wide, apex acute or obscurely acuminate, grad- 

 ually narrowed from the middle or upper two-thirds to the 

 base, margins irregularly dentate, or serrate-dentate, the teeth 

 usually tipped with tufts of hairs, the upper surface in maturity 

 entirely glabrous, olivaceous, dull, the lower rather densely fer- 

 ruginous-villous ; lateral nerves about 18 on each side of the 

 midrib, distinct, ascending, curved, the reticulations lax ; petioles 

 stout, 1 cm long or less. Infructescence axillary, solitary, um- 

 bellate, its peduncle stout, about 1 cm long, each bearing from 

 10 to 20 fruits, the individual fruits oblong-ellipsoid, about 1.5 

 cm long, brown, glabrous, narrowed at both ends, their pedicels 

 slender, about 1 cm in length. The inflorescence is apparently 

 subtended by a large bract or by bracts. 



Mindanao, Lanao District, Lanao-Cotabato trail, For. Bur. 2521 U Al- 

 varez, March 21, 1916, in dipterocarp forests, altitude about 1,000 meters. 



A most characteristic species, distinguishable by its indumentum, its 

 large, broadly oblong-oblanceolate leaves, and its umbellate fruits. 

 CYRTANDRA CASTANEA sp. nov. § Dissimiles. 



Frutex circiter 1 m altus, partibus junioribus subtus foliis 

 ad costa et nervis calycibusque dense castaneo-vfllosis ; foliis 

 alternis vel oppositis et dissimilis, subcoriaceous, oblongo-oblan- 

 ceolatis, usque ad 15 cm longis, tenuiter acutissime acuminatis, 



