Rubus lasiostylus Focke (1891)

Dash, S. S. & Gupta, C., 2017, Nomenclatural notes on Rubus lasiostylus (Rosaceae) and lectotypification of three names in Rubus, Blumea 62 (2), pp. 121-124 : 122-123

Rubus lasiostylus Focke (1891) t. 1951

Rubus lasiostylus Focke var. lasiostylus .

Rubus lasiostylus forma tomentosus Focke (1891) t. 1951 (as forma ‘ tomentosa ’), nom. inval.; R. lasiostylus var. tomentosus Focke in Lu & Boufford (2003) 232, nom. inval.

Type. Augustine Henry 5788 A (lectotype designated here K *, http:// specimens.kew.org/herbarium/ K000737817 ; isolectotypes BM *, CAL, GH *), China, Hupeh [Hubei], Patung [Badong], Mar. 1889. – Fig. 2b .

Diagnostic characters — Branches, petioles, pedicels and abaxial surface of calyx densely tomentose. Leaves 3–5-foliol- ate. Stipules and bracts linear-lanceolate. Bracts up to 8 mm long. Densely yellow tomentose or woolly drupelets. Styles pubescent that tend to be persistent. Red colour of drupelets (whitish, tannish when dry).

Distribution — India (Arunachal Pradesh), China. Rubus lasiostylus has been assumed to be endemic to China (Hubei Province). However, the collection from Dibang Valley, Arunachal Pradesh, confirms its presence in India and also constitutes a new addition to Rubus in India.

Specimen examined. INDIA, Arunachal Pradesh, Dibang Valley,Pasopani

– Tahupani, 30 June 2002, M. K . Pathak 4099 ( CAL).

Notes — Focke (1891) described R. lasiostylus on the basis of specimens collected on March 1889 by Augustine Henry from Patung [Badong], Hupeh [Hubei] Province , central China. We found specimens in GH *, K * and BM * that can be considered original material. The single herbarium sheet in BM * (barcodes BM000622276 , BM000622277 ) has specimens with two differ- ent field numbers (upper 5788; lower 5788 A). The specimen at K * (barcode K000737817 ) has an original annotation ‘typica et tomentosa’ by Focke himself and is selected here as the lectotype ( Fig. 2a ) . The other four specimens, no. 0000011654 and 0000011657 ( CAL); no. 0040643 ( GH *, all three twigs) and no. BM000622277 ( BM *) are considered as isolectotypes .

Figures

Fig. 2 a. Field photograph of Rubus lasiostylus Focke var. lasiostylus; b. lectotype image of Rubus lasiostylus Focke var. lasiostylus (K); c. lectotype image of Rubus lasiostylus Focke forma glabratus Focke (GH); d. lectotype image of Rubus eucalyptus Focke (K).