Chrysosplenium ramosissimum Y. I. Kim & Y. D. Kim 2018
- Chrysosplenium ramosissimum Y. I. Kim & Y. D. Kim (Saxifragaceae), a new species from Korea
- Chrysosplenium ramosissimum
Diagnosis. Chrysosplenium ramosissimum is most similar to the sympatric species C. valdepilosum, but the former is readily distinguishable by the presence of yellowish-green (vs. bright yellow) bracteal leaves during flowering, highly branched and elongated sterile branches after fruiting (Fig. 4), shiny silvery dots on sterile branch leaves and larger tubercles on the seed coat (Fig. 3). Figure 1. Chrysosplenium ramosissimum Y. I. Kim & Y. D. Kim. A Flowering individual B fruiting individual C sterile branch habit after fruiting D inflorescence and bracteal leaves E-F flower G stamen at various stages H flower longitudinal section I infructescence and bracteal leaves J capsule with persistent sepals K capsule, sepals removed L capsule, longitudinal section M capsule, before dehiscence (top view) N capsule, after dehiscence (top view) O node of sterile branch, enlarged P seed, side view (left), top view (right) Q seed coat, enlarged. Figure 2. Chrysosplenium ramosissimum Y. I. Kim & Y. D. Kim. A Inflorescence with bracteal leaves B sterile branches and basal leaves during flowering with withered basal leaves C sterile branch leaves with shiny silvery spots during flowering D sterile branch after fruiting E plant habit during flowering. Figure 3. Upper surface of sterile branch leaves of Chrysosplenium ramosissimum (A 1) and C. valdepilosum (B 1). Scanning electron micrograph of seeds of C. ramosissimum (A 2) and C. valdepilosum (B 2). Figure 4. Sterile branch outline of Chrysosplenium ramosissimum (A) and C. valdepilosum (B) after fruiting.
Ecology. Chrysosplenium ramosissimum occurs in deciduous forests of mountain valleys, where it grows in humid and semi-shaded areas near small creeks along with Quercus mongolica Fisch. ex Ledeb., Fraxinus rhynchophylla Hance and Acer buergerianum Miq. The flowering period of this species is late March to early May and the fruiting period is late May to early July.
Etymology. The specific epithet of the new species refers to the highly branched sterile branches after fruiting.
Additional specimens examined (paratype). SOUTH KOREA. Gangwon-do: Mt. Seonjaryeong, Hoenggye-ri, Daegwallyeong-myeon, Pyeongchang-gun, 37 ° 41 ' 25.80 " N 128 ° 45 ' 27.22 " E, elev. 872 m, 24 Apr. 2015, KYI- 2015002 (HHU), KYI- 2015003 (HHU), KYI- 2015004 (HHU), KYI- 2015005 (HHU), KYI- 2015006 (HHU); 37 ° 41 ' 33.65 " N 128 ° 45 ' 25.26 " E, elev. 872 m, 16 Apr. 2016, KYI- 2016001 (HHU), KYI- 2016002 (HHU), KYI- 2016003 (HHU), KYI- 2016004 (HHU), KYI- 2016005 (HHU), KYI- 2016006 (HHU).
Type. SOUTH KOREA. Gangwon-do: along a stream near a hiking trail to Guksa Seonghwangsa (temple), Mt. Seonjaryeong, Hoenggye-ri, Daegwallyeong-myeon, Pyeongchang-gun, 37 ° 41 ' 25.80 " N, 128 ° 45 ' 27.22 " E, elev. 872 m, 24 Apr. 2015, KYI- 2015001 (holotype HHU; isotypes HHU, KB).