45 



pedunculo communi l'5-2'5 cm. longo, fere glabri. Pedicelli graciles, 

 2 mm. longi, glabri. Flares albi, mediocres, glabri. Fructn* 

 ignotus. — A. varians, Craib, Kew Bull. 1911 p. 32, non Radlk. 



Chiengmai, thin bush about 1*2 m. high in evergreen jungle on 

 Doi Sootep, 900 m., Kerr, 685. 



Sapindus Rarak, DC. Dittelasma Rarah, Hook. f. — F.B.I., i. 

 p. 672 ; For. Fl. Burma, i. p. 297 ; Fl. Indo-Chine, i. p. 1018. 

 Phre, Hooe) Kamin, 165 m., Luang Vanpruk, 203. 

 Distr. Indo-China, Malaya. 

 Lao name, Ma Sak (ex Luang Vanpruk). 



Sapindus ? siamensis, Radlk., ob fructum ignotum dubia, si revera 

 hujus generis affinis S. tomentoso, Kurz (sectionis Dittelasma), 

 a quo inter alia differt germine tomento denso flavescente-albido 

 induto. 



Arbor ramis teretiusculis sulcatis 3-4 mm. crassis griseo-pubes- 

 centibus cortice nigro-fusco. Folia abrupte pinnata, 3-4 juga, 

 petiolo 4-6 cm. longo adjecto 20-30 cm. longa, rhachi supra bisul- 

 cata sordid e pubescente in apiculum sterilem subulatum terminata ; 

 foliola inferiora subopposita, superiora alterna, elliptico-oblonga, 

 utrinque obtusa vel subacuta, interdum quadammodo inaequilatera, 

 inferiora latere exteriore, superiora latere interiore angustiora 

 brevioraque, cum petiolulis 3-5 mm. longis 10-18 cm. longa, 4-7 cm. 

 lata, integerrima, membranaceo-chartacea, nervis lateralibus utrinque 

 10-12 sat approximatis oblique erectis venisque reticulatis supra vix 

 subtus sat prominentibus, supra praeter nervos glabriuscula, e 

 livescenti-viride in subfuscum vergentia, nitidula, subtus molliter 

 pubescentia pallidiora, opaca, glandulis microscopicis clavatis super- 

 ficiei subadpressis (nee ut in reliquis Sapindi speciebus in foveolas 

 conchiformes impressis) raris adspersa, epidermide paginae supe- 

 rioris e cellulis valde convexis granulato-punctatis inanibus conflata, 

 paginae inferioris stomatum copia insigni. Panicula terminalis, 

 13-18 cm. longa, pauciramosa, rhacheos apice ramisque thyrsoideis 

 dense cymulas (polychasia vel dichasia in cincinnos abeuntia) sub- 

 sessiles gerentibus, bracteis bracteolisque subulatis pubescentibus ; 

 flores unisexuales, 5 mm. longi et lati, oblique symmetrici, $ breviter, 

 Q longius pedicellati, pedicellis 3-6 mm. longis basi articulatis. 

 Sepala 5, breviter oblonga, obtusa, dense albide tomentosa, ciliata, 

 intus subglabra. Petala 4 (infimi sede inter sepalum 3 et 5 vacua) 

 sub disci margine inserta, subspatulata, lamina ovato-oblonga ob- 

 tusiuscula concava dorso puberula intus glabra in unguem lamina 

 paullo breviorem dorso margineque villosum attenuata, supra unguem 

 squamulis 2 deflexis dense villoso-barbatis dorso minutim cristatis 

 aucta. Discus (in floris parte superiore ante sepalum 4) unilateralis 

 inter petalorum insertiones in lobulos tumens, glaber. Stamina 8, 

 intra discum circa pistillum vel pistilli rudimentum inserta, fili- 

 formia, floris (J exserta, floris Q breviora germen vix superantia, 

 sterilia, praeter apicem villosula, antheris breviter ovatis subapicu- 

 latis dorso supra basin emarginatam affixis introrsis glabris. Germen 

 (floris S rudimentarium) ad disci marginem inferiorem ante sepalum 

 3 et 5 insertum, trigono-ovatum, 3-sulcatum, 3-loculare, dense 

 albide tomentosum, in stylum germen aequantem subulato-filiformem 



