Fan si Pan, sitijalnl in northern Vifinani near l\w honh-r with China and reaching an ahilude of ;5lk"5 in, is llie highest mountain in Vietnam. The flora of this mountain and surrounding region is rieli, containing a mixture of subtropical and lerufU'rate components. Tt also su|)ports many reli<'lual |»lant species thai jmssihly represent remnant extensions of tlie old. subtropical flora of the southern Yunnan Province of China. The flora is diverse and charaiterized by the following: Aceraceae (Acer); Cupressaceae {Fokienia hodginsii (Dunim) Henry & Thomas); Ericaceae {Rhododendron, Varriniiim); Fagaceae {Castauea, Castanopsis, Fagius, IJthoiarpus, Qucrcus); Juglandaceae [Carya. Engelhardiiu Juglans. Platyraryo); Pauraceae (Reilsrhmiedin. Machilus. Phoehe, Neolitsea); Magnoliaceae {l.triodcudron, Magnolia. Manglietia. Michelia); and Pinaceae (Ahies nukiangetusis (]heng & L. K, Fu, Tsuga rhinertsis (Franch.) Pritz).
The assessment of a recently discovered Laotian-Vietnamese endemic pine-Pinus cernua (Pinaceae) is presented including new information about species morphology, taxonomy, ecology, distribution, as well as a proposed identification of conservation status according to the IUCN Red List criteria. An annotated list of related pine species known from eastern Indochina also needed updated conservation assessments is provided as well. Four nomenclature combinations-Pinus dalatensis var. anemophila (Businský) Aver., P. dalatensis var. procera (Businský) Aver., P. wangii var. varifolia (Nan Li et Y.C. Zhang) Aver. and P. wangii var. eremitana (Businský) Aver. are proposed. Аннотация. В статье представлены оригинальные результаты исследования морфологии, таксономии, экологии, распространения и охранного статуса (IUCN Red List criteria) недавно открытой сосны-Pinus cernua (Pinaceae), эндемичной для Лаоса и Вьетнама. Приведен аннотированный список родственных таксонов, встречающихся на территории Восточного Индокитая и остро нуждающихся в охране. Предложено четыре новых номенклатурных комбинации в ранге разновидности: Pinus dalatensis var. anemophila (Businský) Aver., P. dalatensis var. procera (Businský) Aver., P. wangii var. varifolia (Nan Li et Y.C. Zhang) Aver. и P. wangii var. eremitana (Businský) Aver.
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