Taiwania, 56(2): 149-152, 2011 NOTE Lectotypification and Recollection of Rochelia laxa I. M. Johnst. (Boraginaceae) from Type Locality after the Lapse of Forty Years S. K. Srivastava(1*) and Kumar Ambrish(1) 1. Botanical Survey of India, Northern Regional Centre, Dehradun (Uttarakhand), India. * Corresponding author. Tel: +91 1352755478; Email: [email protected] (Manuscript received 23 July 2010; accepted 7 October 2010) ABSTRACT: A note on lectotypification of Rochelia laxa I.M. Johnst. is presented in this paper. This is necessary in order to fix the current usage of the name since the holotype sheet is found to be missing. Consequently, this taxon is also recorded from the type locality after a gap of forty years since its type collection. KEY WORDS: India, lectotypification, recollection, Rochelia laxa, type locality. INTRODUCTION 1969. In the protologue the specimens of Koelz 2946a was designated as ‘type’ by the author and mentioned the During the course of identification of the preserved specimen are housed at Gray herbarium (GH). unidentified specimens collected from Lahaul-Spiti, Kazmi, 1971 in his revision of the Boraginaceae of West Himachal Pradesh, housed in BSD herbarium, Botanical Pakistan and Kashmir mentioned the collection of Survey of India, Dehradun, one of the authors (KA) Koelz’s 2946a as holotype and Koelz 2946b as an isotype came across two unidentified specimens collected by both in GH. Consequently, after thorough search, U.C. Bhattacharyya 52017 from Rahrik, Lahaul in holotype sheet (Koelz 2946a) could not be traced and is Lahaul-Spiti district at an altitude of 3,600 m. Both the found to be missing at GH as confirmed by the curator specimens belong to genus Rochelia Rchb. which have (by pers. comm. received from Dr. Brian Franzone, been critically studied and matched with the allied Curatorial Assistant, Harward University Herbarium, species of the genus in the herbaria of BSD, DD, CAL GH, USA). This necessitated the lectotypification of the and also compared with all the existing species of name as per code (cf. Art. 9.2 of McNeill et al., 2006) Rochelia in India based on literature (Johnston, 1940; and hence the isotype sheet at GH (Koelz 2946b) is Kazmi, 1971; Nasir, 2009) which finally turned out to choosen here as lectotype (cf. Art. 9.10 of McNeill et al., Rochelia laxa I. M. Johnst. 2006). The rest of the six specimens were separated on The genus Rochelia belonging to family the right side from top to bottom of the sheet, Boraginaceae is represented by ca 20 species corresponding to another label Rochelia stellulata (Mabberley, 2008) and distributed worldwide from collected from Jispa, Lahaul, Punjab, Dry plain, alt. Central South-west Asia to the Mediterranean basin and 10,500 ft., Fls. Baby-blue, eye narrowly white, 15.6. Australia (Kazmi, 1971). In India, the genus is known by 1931, Koelz 2042 were also cited in the protologue by eight species from Kashmir, Himachal Pradesh and Johnston, which attains the status of paratypes. Kazmi Uttarakhand in North-west Himalaya. (1971) in his revision of family Boraginaceae of West Rochelia laxa was first described by I. M. Johnston Pakistan and Kashmir has not mentioned any collection in the year 1940 based on the Koelz’s collections from of R. laxa from Himachal Pradesh, though he used the Zanskar, Ladakh in Kashmir, India in year 1931. In the term North-west India under distribution. protologue Johnston has also recorded this taxon from R. laxa differs from its allied species Rochelia other parts of Ladakh and Lahaul-Spiti in Himachal rectipes Stocks in having more loosely branched habit, Pradesh as well. The image of the type and authentic elongated inflorescences, deflexed, spreading, rather specimens of R. laxa have been procured from Gray than ascending pedicels and smaller nutlets with shorter herbarium (GH), USA and K. The type sheet from GH style. bears seven specimens arranged from left to right in After thorough scrutiny of literature (Kachroo et al. clockwise manner. A single specimen pasted on the left 1977; Naithani, 1990; Kachroo, 1993) and searching of side of the sheet labelled as Rochelia stellulata Rchb. herbarium specimens at DD, RRL, CAL, K it is (Koelz 2946b) from Bok, Zanskar, Kashmir growing in concluded that this species was never recollected after camp ground at an altitude of 11,500 ft. was labelled as the type collection from any of the localities in Jammu & isotype of R. laxa as determined by S. M. A. Kazmi in Kashmir and Himachal Pradesh, though there has been 149 Taiwania Vol. 56, No. 2 regular field trips for the floristic survey and exploration to the areas of Lahaul-Spiti and Ladakh. Chowdhery and Wadhwa (1984) and Aswal and Mehrotra (1993) have also not included this species in their Flora of Himachal Pradesh and Lahaul-Spiti respectively. This species was recollected after a lapse of 40 years by U. C. Bhattacharyya in the year 1973 from one of the type locality i.e. Rahrik in Lahaul-Spiti, Himachal Pradesh. The record of this species after the type collection and after the lapse of four decades establishes its endangeredness. It is worth to mention that all the type localities as mentioned in protologue are located in the Cold Desert regions of the North-western Himalaya which is one of the micro endemic centres of the hot spot. Not much information about this species is documented in the literature. Hence, detailed description, digital image of the recollected specimen (U. C. Bhattacharya 52017) along with the image of designated lectotype specimen from GH is provided to facilitate easy identification and to locate it further from the neighbouring areas. (Figs. 1 & 2). TAXONOMIC TREATMENTS Rochelia laxa I. M. Johnst. in J. Arn. Arb. 21: 55. 1940; Kazmi in J. Arn. Arb. 52: 117. 1971; Stewart in Nasir & Ali, Annot. Cat. Vasc. Pl. W. Pak & Kashmir 602. 1972. Holotypus (missing): India: Jammu and Kashmir state, Bok, Zanskar, 3450 m, camp-ground, Sept. 13, 1931, Koelz 2946a (GH). Lectotypus (designated here): India: Jammu and Fig. 1. The scanned recollected herbarium sheet image of Kashmir state, Bok, Zanskar, 3,450 m, camp-ground, Rochelia laxa I.M. Johnst (deposited at BSD). Sept. 13, 1931, Koelz 2946b (GH, image! [GH00096937]). pedicels up to 8 mm long, narrowed towards the base, covered with uncinate hairs. Nutlets 2 white, Erect, annual herb, 8-25 cm high. Stems conspicuous tuberculate, ribbed 2-3 mm long. Seeds slender, hispid, much branched from base, lower oblong-ovate, one in each nutlet, whitish-brown. branches short up to 8 cm long, upper branches long, Flowering and Fruiting: June – August. divaricate, up to 15 cm long. Leaves sessile, lower leaves Distribution: India: Jammu and Kashmir (Ladakh), ovate-oblong or obovate, 0.5-1.8 × 0.2-0.5 cm, attenuate Himachal Pradesh, Lahaul-Spiti. at base, obtuse to subrounded at apex, entire at margins, Habitat: Grows on dry open slopes at an altitude of hairy tuberculate on both the surfaces covered with thin 3,600 m. spinulous hairs, mid vein depressed above, embossed Specimens examined: India : Himachal Pradesh, below; middle and upper leaves narrowed, linear-oblong Lahaul-Spiti, Rahrik, 3,600 m, 16.7.1973, U. C. Bhattacharya 52017 or ovate-lanceolate, 0.2-1 × 0.1-0.2 cm, much hairy (BSD). tuberculate on both surfaces, acute at apex, entire at margins. Inflorescence axillary or terminal, lax racemes, ACKNOWLEDGEMENTS unilateral, bracteate; bracts ovate-lanceolate, small. Flowers tubular, blue ca 3 mm across. Calyx up to 4 mm Authors are thankful to the Director, Botanical Survey of long, linear-lanceolate, usually erect, shorter than India, Kolkata, for facilities. They are also thankful to keepers nutlets, rarely exceeding, covered with white unicinate of the herbaria of CAL, DD, K and GH for providing the data hairs. Style usually exceeding nutlets, whitish-brown. and images for confirming the identity of this species. Thanks Fruits up to 1 cm long, dull brown, hispid. Fruiting are also due to the Keeper, GH herbarium (USA) for according 150 June, 2011 Srivastava & Ambrish: Lectotypification and recollection of Rochelia laxa Fig. 2. The scanned lectotype image of Rochelia laxa I. M. Johnst (deposited at GH). permission to publish the image of the type specimen. We also Himachal Pradesh : An analysis. vol. 1-3. BSI, Howrah, thank Sri Gautam Kr. Upadhyay, Ex- SRF, CNH, BSI for India. helping us in various ways during finalization of the Johnston, I. M. 1940. Studies in the Boraginaceae. J. Arn. manuscript. Arb. 21: 55. Kachroo, P. 1993. Plant diversity in North-west Himalaya: A LITERATURE CITED preliminary survey. In: Dhar, U. (ed.), Himalayan biodiversity. Conservation strategies. Nainital, India. pp. Aswal, B. S. and B. N. Mehrotra. 1994. Flora of Lahaul- 111- 132. Spiti – A cold desert in North-west Himalaya. BSMPS, Kazmi, S. M. A. 1971. A revision of the Boraginaceae of West Dehradun, India. Pakistan and Kashmir. J. Arn. Arb. 52. 110-136. Chowdhery, H. J. and B. M. Wadhwa. 1984. Flora of Mabberley, D. J. 2008. Mabberley's plant book: A protable 151 Taiwania Vol. 56, No. 2 dictionary of plants, their classification and uses. Bhutan (not recorded in Sir J.D. Hooker’s Flora of British Cambridge University Press. Cambridge, U.K. 1040pp. India). Surya Publication, Rohini Printers & Publishers, McNeill, J., F. R. Barrie, H. M. Burdet, V. Demoulin, D. L. Dehradun, India. Hawksworth, K. Marhold, D. H. Nicolson, J. Prado, P. Nasir, Y. J. 1989. Boraginaceae. In: Ali, S.I. and Nasir, Y.J. C. Silva, J. E. Skog, J. H. Wiersema and N. J. Turland (eds.), Flora of Pakistan 191. 157. 2006. International Code of Botanical Nomenclature Stewart, R. R. 1972. In: Nasir, Y. J. and S. I. Ali (eds.) Annot. (Vienna Code). Regnum Veg. 146. Cat. Vasc. Pl. W. Pakistan & Kashmir. 602. Fakhri Printing Naithani, H. B. 1990. Flowering Plants of India, Nepal and Press, Karachi, Pakistan. Rochelia laxa I. M. Johnst.（紫草科）之選定模式的指定及消失四十年後模式產 地的再採集 S. K. Srivastava(1*) and Kumar Ambrish(1) 1. Botanical Survey of India, Northern Regional Centre, Dehradun (Uttarakhand), India. * 通信作者。Tel: +91 1352755478; Email: [email protected] (收稿日期：2010年7月23日；接受日期：2010年10月7日) 摘要：本篇論文指定 Rochelia laxa I.M. Johnst的選定模式。在該種的模式標本消失之後這 是必要的，並且用以解決當前植物名稱使用的問題。此外，本篇論文也同時報導這個物種 於消失四十年後又在其模式的採集地再次被紀錄到。 關鍵詞：印度、選定模式的指定、再採集、Rochelia laxa、模式產地。 152