No abstract

A new species of Onosma (Boraginaceae), O. mersinana, in sect. Asterotricha, is described from southern Turkey, and its affinities discussed.

Regarding experimental data on the multi-factorial reduction of the thermostability of collagen, the following sequence of the mechanism of Dupuytren's contracture is discussed: 1. Hereditary or acquired weakness of fibres of the palmar fascia 2. Further disturbance of the physical property of collagen by the cumulative effects of mechanical, i.e. traumatic, influence. 3. By this means an induced stepwise shrinkage of released fascial fibres in body temperature. 4. Stabilisation of the shortening (contracture) by development of collagen. This hypothesis is supported by histological, polarizing-microscopic, electron-microscopic and chemical results.

Summary A list of the taxa of Araceae in W. H. Schott's herbarium in Vienna which were lost at the end of World War II is given.

1. Onosma intricaturn RIEDL ot FREITAG~ sp. n.Species perennis caudiee erassissimo, lignoso, deeorticante, cinereo-fuseo, interdum ultra 10 mm in diametro crasso, ramoso. Pars vegetativa verosimiliter haud typiee evoluta eaulibus primariis diffraetis. Caules secundarii numerosi, tenuissimi, ut bases caulium primariorum valde intrieati, ramosi, 10--15 em alti, setis patentibus rigidis albis 2--2,5 mm longis, basi i~:[latis et pilis brevioribus, rigidis, densissimis, patentibus, sursum vel deorsum versis vel subhorizontalibus vestiti, ramis lignifieantibus glabreseentibus. Folia subbasalia et eaulina (10--)12--25(--30)mm longa, 2(--)3--8 mm lata, oblanceolata vel subspathulata, in parte quarta apieali latissima, obtusa, margine revoluta, sessilia, rarissime subpetiolata, supra setis patentibus, tubereulis paulo elevatis, glabris, e seriebus 2--3 cellularum eonvexarum nitidarum latitudine paulo tantum longiorum compositis insidentibus, inter setas pilis rigidis, longiuseulis, arete appressis tecta, subtus setis tantum in margine et in nervo mediano ornata, tota faeie densissime albo-tomentosa. Folia suprema saepe valde redueta, 2--3 mm tantum longa. Braeteae minutissimae, lineari-lanceolatae, aeutae, pedieellis saepe haud exaete oppositae. Inflorescentiae certe atypiee evolutae, fureatae, pauei-et laxiflorae. Pedieelli 2--3 mm longi, flexuosi, setosi. Calyces paulo post llorendum -~ 5 mm longi, demure usque ad 7 mm (vel ultra?) elongati, patule setosi, e laeiniis 5 usque ad basin liberis, anguste linearibus, aeutis, 0,5 mm vix latis. Corolla coerulea, per longitudinem plieata plieis intensius coloratis, 7--8 mm longa, subtubulosa, supra basin et infra lobos triangulares, aeutos, longitudine subaequilatos constricta, extra imprimis in dimidio superiore pilosa, iatus glabra annulo longe piloso inter bases filamentorum 1,5ram fete supra basin eorollae exeluso. Annulus sqnamulosus (,,nectarifer") indistinete tantum evolutus, parce pilosus. Filamenta subfiliformia, prope basin antherarum inserta, ~ 4 mm longa. Antherae i 7 mm longae, tota longitudine eonnatae, e corolla longe