A new combination is proposed for Phlegmariurus (Herter) Holub (Lycopodiaceae): P. obovalifolius (Bonap.) V.T. Tran & N.V. Duy, comb. nov., and a species of Phlegmariurus, lancifolius sp. from southern Vietnam, described illustrated. It distinguished the closely related by its leaves lanceolate, apex acuminate-acute, 1.1-1.5 × 0.4-0.6 cm, sporophyll cuneiform or broadly ovate, c. 2 mm, apiculate with acuminate tip, sporangia reniform.

Based on a careful examination of the voucher specimens, newly recorded Spiradiclis purpureocaerulea H. S. Lo from Vietnam was confirmed to be misidentification coccinea Lo. Coincidentally, is species previously known only China, and represents new record for flora Vietnam. True specimens were collected by authors in Thanh Hua Province (Vietnam) 2017. Therefore, we report as records here. Detailed descriptions color photographs two key five are also provided.

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A three-step procedure was applied to synthesize seven novel zerumbone ethers 7a–g with N-(4-hydroxybenzyl) benzamide, substituted and cinnamamide moieties, including simultaneous O- N-acylations, ester hydrolysis, O-alkylation. The structure of intermediates target compounds elucidated using one-dimensional two-dimensional nuclear magnetic resonance, high-resolution mass spectrometry data. Their cytotoxic activities were screened on three human cancer cell lines HepG2, LU-1, HeLa. results...

Magnolia champacifolia J. E. Dandy ex F. Gagnepain, sp. nov., originally described, but invalidly published in 1938, is validated here by designating the flowering sheet as holotype. Otherwise, a new species of L., M. lamdongensis V.T. Tran, N.V. Duy & N.H. Xia, nov. from southern Vietnam described and illustrated. It distinguished closely related albosericea Chun Tsoong its leaf blades narrowly ovate, glabrous, apex long acuminate, petiole c. 3 cm long, tepals short peduncle densely...

Capparis gialaiensis Sy, a new species of Capparaceae from Vietnam is described and illustrated. It morphologically closest to C. longistipitata, but differs in length thorns, filaments gynophore, shape the leaf size petals. Color photographs, table comparing with closely allied key are provided facilitate identification.

Since last account of the genus Aspidistra Ker Gawler (1822: 628) in Vietnam reported 43 species (Tillich 2014), at least 25 additional were discovered and described this country (Averyanov & Tillich 2014, 2015, 2016, Vislobokov et al. 2014a, 2014b, Leong-Skornickova Olivier Ly Tilllich Averyanov 2016). Meanwhile, diversity allied countries remains insufficiently inventoried. One more new Aspidistra, named here as A. letreae was recently central Vietnam. This is illustrated with data on...

This paper continues the publication of newly obtained results from a continuing taxonomic investigation genus Aspidistra in mainland southeast Asia. It includes descriptions and illustrations seven taxa discovered China Vietnam, A. deflexa Aver., Tillich & V.T. Pham, heterocarpa V. T. Pham var . heterocarpa, var. echinata T.A. Le, nigra K. S. Nguyen, sessiliflora Aver. Tillich, sinuata tonkinensis (Gagnep.) F. Wang Y. Lang compacta Tillich. Specific status is proposed for vietnamensis...

A new genus of Arundinarieae, Khoonmengia, is established to accommodate a unique bamboo species, K. honbaensis, from central-southern Vietnam. The morphological features, habitats and distribution Khoonmengia related genera, i.e. Ampelocalamus Hsuehochloa, are compared. characters its scrambling habit, internodes with brownish green dots, conspicuous nodes swollen at one side, elliptic buds wholly sunken into culm, extravaginal branching pattern, mid-culm branch complement central dominant...

Sixteen compounds (1-16) were isolated from Impatiens chapaensis. Chemical structures determined by spectroscopic analyses and comparisons with previously published data. This report is the first to identify 1, 5-7, 10, 12-14, 16 genus Impatiens. Seven chosen isolates (5, 7, 11, 12, 15, 16) submitted for α-glucosidase inhibition assays acarbose as positive control (IC50 = 227.14 ± 13.71 µM). Flavonoid 5 exhibited a significant inhibitory effect 101.00 9.01

The synthesis and cytotoxicity evaluation of fourteen new chalcones containing 5-fluorouracil were introduced in which nine as Mannich bases 8a-i synthesized from 2'-hydroxyacetophenone (1) three steps including chloromethylation, N-alkylation Claisen-Schmidt reactions. Other 14a-e obtained Click reaction between 1,3-dipropargyl-5-fluorouracil azide derivatives 2',4'-dihydroxychalcone. bio-assay results showed that 11 (excluding 8d, 8f 8h) exhibited against four human cancer cell lines...

Neomicrocalamus and Temochloa are closely related to bamboo genera. However, when considered with newly discovered morphologically similar material from China Vietnam, the phylogenetic relationship among these three groups was ambiguous in analyses based on DNA regions. Here, as a means of investigating relationships exploring potential sources genomic conflicts, we present phylogenomic examination whole plastome, single-nucleotide polymorphism (SNP), single-copy nuclear (SCN) gene datasets....

One rare, poorly known species from India, South China and Thailand - Jasminum extensum Wall. ex G. Don is recently discovered in Vietnam representing a new record to the flora of country. The plant differs its closely related viz. pierreanum having coriaceous leaves 5-6 primary veins each side mid-rib. Detailed information on taxonomy, types, morphology, habitat, ecology, distribution studied voucher specimens, as well illustrations are provided here for identification.

Schizostachyum langbianense is a new woody bamboo from high mountain, Lang Bian, in southern Vietnam, which being described and illustrated. It similar to S. ninhthuanense having short ultimate inflorescence branchlets on clusters of few pseudospikelets are borne. However, it differs its culm leaves with horizontal or only slightly concave apical portion, leaf blades that narrowly lanceolate, palea not apically bifid dorsally sulcate 2 keels. Both species occur the same mountain region, but...

A new species, Stephania polygona N.H. Xia & V.T. Chinh, is described and illustrated from southern Vietnam. It similar to S. subpeltata elegans in general appearance, but differs by its polygonous lobed leaf blade, five eight veins, longer, red purple sepals.

We report a new record of Jasminum albicalyx Kobuski in Vietnam.The plant differs from J. pedunculatum Gagnep., closely related taxon, by foliar and floral characters such as less number lateral veins, presence domatia at vein axils on the abaxial surface leaf, smaller bracts, white calyx having more lobes corolla.Morphological description, line drawing color photographs are provided addition to species key allied Vietnam.

Impatiens kamtilongensis Toppin (Balsaminaceae), collected from Xuan Lien district, Thanh Hoa province is reported here as a new record for the flora of Vietnam. I. can be distinguished its closest ally finetii by hairy white stem, yellow flowers having 2 red blotches, bigger sepals and glabrous capsule. The specimens are deposited in Herbarium Institute Ecology Biological Resources (HN) Ha Noi, Morphological redescription illustrations provided along with notes on distribution, ecology,...

Jasminum vietnamense B.H. Quang & Joongku Lee, sp. nova (Oleaceae) from Nam province of Vietnam is described and illustrated. It morphologically similar to J. adenophyllum, fuchsiifolium pierranum, but differs them by having a comparatively smaller calyx tube, absence domatia at vein axils the leaf, considerably bracts.

Neomicrocalamus and Temochloa are closely-related genera for which ‘inflorescence’ structures were incompletely understood difficult to reconcile. After re-examining the inflorescence morphology, so-called ‘spikelets’ of both as described should instead be recognised pseudospikelets with mostly inactive axillary buds. The new bamboo taxa, comprising two varieties a species, placed in , representing genus record China Vietnam.

Aspidistra linearistyla, a new species of Asparagaceae from Ha Giang Province, Vietnam, is described and illustrated. It morphologically similar to A. cerina, but clearly distinguished by its tubular perianth 24–26 mm long with white tube yellow lobes, linear pistil that is13–14 0.8–1 in diameter. The currently known only the type locality northern Vietnam. A detailed taxonomic description along photographs diagnostic characters presented.

Phyllagathis phamhoangii V.T.Pham, T.C.Vu & Ranil is described and illustrated from Quang Nam province, central Vietnam. Diagnostic features of the new species are short acaulescent rhizomatous herbs with pink flowers. The distinct closely allied P. nanakorniana in sparse hairs on all its parts except petals stamens, much longer petioles, dichasial inflorescences, hypanthia, stamens unequal length, ovary; subrotunda by taller plants, smaller leaves cordate to reniform blades a shortly...

Genetic diversity and variation of four naturally distributed Huperzia serrata populations in Vietnam were analyzed based on the DNA fingerprint data obtained by ISSR SCoT techniques separately combined together. Both markers showed that genetic was relatively high at population species level, except for Hoang Lien population. The parameters Nei’s gene index (He) = 0.1436, Shannon (I) 0.2161, percentage polymorphic bands (PPB) 45.45%; Bach Ma population, He 0.21, I 0.33, PPB 71.97%; Ngoc...