NOTES ON WEST AUSTRALIAN PLANTS 
287 
anthers are obtuse, not acuminate as in the other. At the same time, 
had I known that the dowers of Lysiosepalum are hexamerous, as 
Mr. Sargent has discovered them to be, 1 should have described his 
No. 782 as a Lysiosepalum , because, although the presence of petals 
has hitherto been a character of that genus, there is no reason why an 
apetalous species should not exist, inasmuch as in Thomctsia both peta- 
loid and apetalous species are known. The plant in question should 
therefore be named Lysiosepalum iiexandeum, comb. nov. Besides 
No. 782, the species is represented at the Museum by Mr. Sargent’s 
No. 1052 from Emu Hill, W. Australia.—S. M.] 
Diciiopogon strictus Baker. Conn or cormoid rhizome about 
18 mm. across, bearing numerous hard dbres, extending to the surface 
of the ground, above, and thick but not tuberous roots below. Leaves 
dried and missing. Pedicels daccid, recurved, articulate at about the 
middle. The dower is much like that of Arthropodium Preissii 
Endl.; the stamens bear a specially close resemblance. The appen¬ 
dages, however, are clearly attached to the anthers, whose connective 
is conspicuous. In A. JPreissii the appendages are attached to the 
apex of the blament, and the connective is invisible. Sandy iron¬ 
stone, Cut Hill, York, W.A. December. Herb. Sargent. 1400. 
Diciiopogon Sieberianus Kunth. llhizome about 8 mm. thick 
by 12 mm. long, with few and short dbres above, and several fusiform, 
deshy, tuberous roots below. Leaves dead at dowering time, linear, 
about 20 cm. long. Pedicels rigid, articulate about the upper fourth, 
sharply redexed near the base when in fruit. Sandy soil in dry bed of 
Avon Biver under Melaleuca rhaphiophylla Schauer trees. November. 
Herb. Sargent. 1401. 
Habitat probably accounts for the presence in abundance and com¬ 
parative absence of dbres in these two species. The comparatively dry 
well-drained soil of the hill-side offers far less opportunity for complete 
decay than the perpetually moist soil of the river-bed. I have not 
succeeded in tracing a previous record of either of these species for 
Western Australia. 
LETTEBS OF J. F. YON JACQUIN (1788-90). 
By A. B. Bendle, D.Sc., F.B.S. 
Matter of great interest to British botanists will be found in Dr. E. 
M. Kronfeld’s notes (Beihefte zumBotanischen Centralblatt, Bd. xxviii. 
Abt. ii. (1921) from unpublished letters sent by the younger Jacquin 
to his father and other members of his family, telling of his experi¬ 
ences during his student journeys to the principal centres of botanical 
work in Germany, the Netherlands, England, and France in 1788-1790. 
Joseph Franz Freiherr von Jacquin (1706-1839) was a son of 
Nicolas Jacquin, the “Linnaeus of Austria,” Professor of Chemistry 
and Botany at the Vienna University, and Curator of the famous 
lloyol Garden at Schonbrunn. Joseph had been carefully trained by 
his father, who himself drew out the plan for the tour, which was 
undertaken under Boyal auspices, for the completion of his studies in 
