Hypochaeris ciliata (Thunb.) Makino (Synonym : Arnica ciliata Thunb.)

Family : Asteraceae

Hypochaeris radicata L. (Synonym : Porcellites radicata (L.) Cass.)

Family : Asteraceae [Naturalized plant]

Hypodematium glanduloso-pilosum (Tagawa) Ohwi (Synonym : Hypodematium fauriei (Kodama) Tagawa f. glanduloso-pilosum Tagawa)

Family : Hypodematiaceae

Hypolepis punctata (Thunb.) Mett. ex Kuhn (Synonym : Phegopteris punctata (Thunb.) Mett.)

Family : Dennstaedtiaceae

Hystrix coreana (Honda) Ohwi (Synonym : Leymus coreanus (Honda) K.B.Jensen & R.R.-C.Wang)

Family : Poaceae

Hystrix longe-aristata (Hack.) Honda (Synonym : Elymus asiaticus Á.Löve subsp. longearistatus (Hack.) Á.Löve)

Family : Poaceae

Iberis amara L. (Synonym : Iberis ruficaulis Lej.)

Family : Brassicaceae

Idesia polycarpa Maxim. (Synonym : Idesia polycarpa Maxim. var. intermedia Pamp.)

Family : Flacourtiaceae

Ilex cornuta Lindl. & Paxton

Family : Aquifoliaceae

Ilex crenata Thunb. (Synonym : Ilex burfordii S.R.Howell)

Family : Aquifoliaceae