IGl 



THE SUMATKAN SPECIES OF SAUKAUJA. 

 Bi' Edmund G. Baker, F.L.S. 



KoRTiiALS in 1839-42 in Verh. Nat. Gres. Bot. described six 

 species of Saurauja from Sumatra: Miqiiel 1862, in Fl. Ind. Bat. 

 Suppl. enumerated fourteen then known to him as occurring in tliis 

 island, hut later in 18G8-G9 in Ann. Mus. Bat. vol. iv. he reduced 

 several of these to forms of other species. 



In the present paper I have included three novelties founded on 

 O. Beccari's " Piante Sumatranae " named in MS. by Dr. O. Stapf 

 in the Kew Herbarium, and I am indebted to Mr. H. N. Eidley for 

 the descriptions of the plants collected on the Korinchi Expedition 

 by Messrs. Robinson and Kloss. I have also endeavoured to deter- 

 mine the species and describe the novelties collected in Sumatra by 

 Di-. H. O. Forbes, thus raising the number for the island to twenty- 

 live. 



The division of the genus into sections or groups is a matter 

 of considerable difficulty. Choisy in his Memoire sur les Ternstroe- 

 onlacece (1855) placed the species with 5 styles in Saurauja 

 and those with 3 in Scapha ; but the styles sometimes vary in 

 number in one and the same individual. Dr. Grilg in Engler's Nat. 

 PHanzenfamilien (iii. 6. 126) divides the genus into two sections — 

 Paniculataj and Fasciculatse, according to the character of the in- 

 florescence ; but there is every possible gradation between such 

 jjlants as *S'. 2)aniculigera Kidley with a lax panicle and >S'. trisfyla 

 DC. and S. demjioensis milii with flowers in fascicles. It there- 

 fore seems advisable to attempt a division into a number of smaller 

 series. 



Except where otherwise stated, the types of the new species 

 described are in the National Herbarium. 



Series 1. Flores paniculati, numerosi. Calyx glaber, margine ciliata. -^ — ^ 

 Folia majuscula, elliptico-obovata. Stjdi 5. 



1. S. PANICULIGEBA Ridley, in Journ. F.M.S. Mus. viii. pt. iv. 19. 



Arbor mediocris, ramis inf]«a- htvibus glabris, superne partibus 

 juvenibus trichomatibus crassiusculis tectis. Folia apice breviter 

 subacuta, basi breviter angustata, obtusa vel rotundata, marginibus 

 breviter dentatis, spinulis pallidis in dentibus, supra glabra Isevia, 

 subtus glabra, nervis horizontalibus elevatis usque ad 18 jjaribus, 

 18-30 cm. longa, 9"5-15 cm. lata, petiolo 3-6*5 cm. longo. Punicula 

 15 cm. longa, 8 cm. lata, in ramis multiflora, laxa, ramis trichoma- 

 tibus tectis. Flores albi, pedicellis 2 cm. longis. Bractece parviB, 

 caducse. Sejyala 2 exteriora ovata, interiora 3 tenuiora orbiculata, 

 coriacea, glabra. Corolla 25 cm. lata, petalis oblongis apicibus 

 rotundatis bilobis. Stamina ad 21, filamentis subulatis, antheris 

 parvis oblongis. Ovarium late rotundatum, glabrum. 



Korinchi Peak, alt. 7300, B. Sf K. ! 

 Journal or BotxVNY. — Vol. 56. [June, 1918.] n 



