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Taxonomists working with material collected by the Sarawak Forest Department have often been hard put to decide how to quote numbers. Is the departmental series number preceeded by a letter S, or an F, or would it be best to quote only the collector and the number? I have tried to unravel the history of the Sarawak Forest Department herbarium number series in order to provide a guide to unequivocal citation. This has not been easy, as all collecting books previous to 1951 have disappeared, apparently during the second world war; many of the herbarium collections are now missing at Kuching and Kepong, where most were distributed, for the same reasons, though there seem also to have been large gaps in the series where numbers were never used. What has eventually been brought to light has been a masterpiece of confusion only vied with in complexity by its Sarawakian forbear, the remarkable numbering, or rather lettering, system of Haviland (explained in Kew Bull. 1907, 197— 198).

The taxonomy of the largely endemic dipterocarp flora of Ceylon is brought into line with that of the rest of the Asiatic subfamily, and a new species is described. Stemonoporus lewisianus Trimen ex Hook. f. finds its correct place at last in Cotylelobium. Balanocarpus brevipetiolaris (Thw.) Alston is transferred to Hopea. Shorea pallescens Ashton (sect., subsect., Shoreae) is described for the first time. Shorea stipularis Thw. is ascribed to sect. Anthoshorea Heim. Doona Thw. is reduced, as a separate section, to Shorea Roxb. ex Gaertn.f., necessitating 7 new combinations and 3 new names. Doona oblonga Thw. is united with Doona disticha (Thw.) Pierre under the name Shorea disticha (Thw.) Ashton. Doona nervosa Thw. is reduced to Doona cordifolia Thw., now named Shorea cordifolia Ashton. The description of the genus Stemonoporus is amplified; a key is provided to all species. Stemonoporus acuminatus (Thw.) Bedd. is further defined. Stemonoporus nervosus Thw. is reduced to Stemonoporus lancifolius (Thw.) Ashton. Shorea reticulata Thw. and Stemonoporus moonii Thw. (= Vateria moonii Thw.) are excluded from the family.

Taxonomists working with material collected by the Sarawak Forest Department have often been hard put to decide how to quote numbers. Is the departmental series number preceeded by a letter S, or an F, or would it be best to quote only the collector and the number? I have tried to unravel the history of the Sarawak Forest Department herbarium number series in order to provide a guide to unequivocal citation. This has not been easy, as all collecting books previous to 1951 have disappeared, apparently during the second world war; many of the herbarium collections are now missing at Kuching and Kepong, where most were distributed, for the same reasons, though there seem also to have been large gaps in the series where numbers were never used. What has eventually been brought to light has been a masterpiece of confusion only vied with in complexity by its Sarawakian forbear, the remarkable numbering, or rather lettering, system of Haviland (explained in Kew Bull. 1907, 197— 198).

The taxonomy of the largely endemic dipterocarp flora of Ceylon is brought into line with that of the rest of the Asiatic subfamily, and a new species is described. Stemonoporus lewisianus Trimen ex Hook. f. finds its correct place at last in Cotylelobium. Balanocarpus brevipetiolaris (Thw.) Alston is transferred to Hopea. Shorea pallescens Ashton (sect., subsect., Shoreae) is described for the first time. Shorea stipularis Thw. is ascribed to sect. Anthoshorea Heim. Doona Thw. is reduced, as a separate section, to Shorea Roxb. ex Gaertn.f., necessitating 7 new combinations and 3 new names. Doona oblonga Thw. is united with Doona disticha (Thw.) Pierre under the name Shorea disticha (Thw.) Ashton. Doona nervosa Thw. is reduced to Doona cordifolia Thw., now named Shorea cordifolia Ashton. The description of the genus Stemonoporus is amplified; a key is provided to all species. Stemonoporus acuminatus (Thw.) Bedd. is further defined. Stemonoporus nervosus Thw. is reduced to Stemonoporus lancifolius (Thw.) Ashton. Shorea reticulata Thw. and Stemonoporus moonii Thw. (= Vateria moonii Thw.) are excluded from the family.