Puccinia caricis-amblyolepis Homma, Trans. Sapporo Nat. Hist. Soc.

Ji, Jingxin, Li, Zhuang, Li, Yu & Kakishima, Makoto, 2022, Phylogenetic approach for identification and life cycles of Puccinia (Pucciniaceae) species on Carex (Cyperaceae) from northeastern China, Phytotaxa 542 (3), pp. 221-255 : 242

C10: Puccinia caricis-amblyolepis Homma, Trans. Sapporo Nat. Hist. Soc. 15: 122, 1938. ( Fig. 13 )

Description: — Spermogonia and aecia not found. Uredinia hypophyllous, scattered, minute, brown to dark brown, covered by epidermis but eventually erumpent. Urediniospores globose, subglobose or obovoid, 22.0–32.0 × 19.6– 25.5 µm (av. 27.0 × 22.5 µm); walls brown, echinulate, 1.1–1.6 µm (av. 1.3 µm), germ pores 2–3. Telia hypophyllous, blackish brown, rounded to broadly elliptic, erumpent. Teliospores broadly clavate, ellipsoid, mostly truncate or rounded at apices, constricted at the septa, attenuate at the bases, 42.0–56.5 × 15.5–21.0 µm (av. 8.5 × 19.0 µm); walls brown, 0.8–1.0 µm (av. = 0.9 µm) thick at sides, 7.5–13.0 µm (av. 9.5 µm) at apices; pedicels persistent, hyaline, 12.5–29.5 µm (av. 19.0 µm) long.

Specimens examined from northeastern CHINA: — Heilongjiang Province, Wuchang , uredinia and telia on Carex planiculmis Kom. , 16 July 2016, HMJAU 8825 , 2 July 2018, HMJAU 8831 . Jilin Province, Changchun , uredinia, and telia on C. planiculmis , 11 September 2014, HMJAU 8827 . Jilin Province, Changbai Mountain , uredinia and telia on C. planiculmis , 29 July 2015, HMJAU 8834 , 8830 . Jilin Province, West of Changbai Mountain , uredinia and telia on C. planiculmis , 1 September 2018, HMJAU 8828 , 8945 . Jilin Province, South of Changbai Mountain , uredinia and telia on C. planiculmis , 2 Septmber 2018, HMJAU 8829 . Jilin Province, South of Changbai Mountain , uredinia and telia on Carex sp. , 23 September 2015, HMJAU 8826 , 2 September 2018, HMJAU 8832 . Jilin Province, Baishan , uredinia, and telia on Carex sp. , 3 September 2018, HMJAU 8936 .

Hosts and distribution in northeastern CHINA ( Fig. 1 ): —Uredinia and telia on Carex planiculmis (A, C, D); Carex sp. (D).

Note: —This clade is considered as a single independent species because specimens are clustered together in the phylogenetic analysis. The morphological characteristics of the uredinial and telial stages are in agreement with descriptions of P. caricis-amblyolepis by Ito (1950) and Zhuang et al. (1998). Although spermogonial and aecial stages were not found they are suspected to be produced on Urtica because phylogenetically close species have these stages on Urtica .

Figures

FIGURE 1. Collection areas in northeastern China. A. Changchun area in Jilin Province. B. Jilin area in Jilin Province. C. Mountanious area in southern Heilongjiang Province. D. Area around Changbai Mountains in Jilin Province. E. Baicheng area in western Jilin Province. F. Yanbian area in eastern Jilin Province. G. Tonghua area in southeastern Jilin Province.

FIGURE 13. Puccinia caricis-amblyolepis on Carex sp. A. Plants producing uredinia and telia on the leaf surface in the field. B. Vertical section of a uredinium. C. Urediniospores. D. Uredinia and telia on the lower leaf surface. E. Teliospores. F. Vertical section of a telium. Scale bars: B, C = 30 μm, E, F = 20 μm.