List: word usually written using kana alone

rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• Cyathea spinulosa (species of tree fern)

usually written using kana alone  noun  noun (generic) 

• Cyathea mertensiana (species of tree fern)

usually written using kana alone  noun  noun (generic) 

• Cucurbita pepo, diverse species that includes many varieties of pumpkin, squash and zucchini

usually written using kana alone  noun  noun (generic) 

• spaghetti squash

usually written using kana alone  noun  noun (generic) 

• Penstemon frutescens (species of beardtongue)

irregular kanji usage  usually written using kana alone  noun  noun (generic) 

• royal poinciana (Delonix regia), flamboyant

usually written using kana alone  noun  noun (generic) 

• Branchinella kugenumaensis (species of fairy shrimp)

usually written using kana alone  noun  noun (generic) 

• Southern maidenhair fern (Adiantum capillus-veneris), black maidenhair fern, Venus hair fern

usually written using kana alone  noun  noun (generic) 

• Arctic fox (Vulpes lagopus)

usually written using kana alone  noun  noun (generic) 

• fairy slipper (Calypso bulbosa, esp. Calypso bulbosa var. speciosa)