Oxalis - Okizarisu

Japanese: オキザリス - おきざりす

A bulbous plant of the Oxalidaceae family (APG classification: Oxalidaceae). There are native species all over the world, and over a dozen species native to tropical America and Africa are cultivated for decorative purposes. The bulbs are creeping rhizomes or bulbs. The flowers wilt at night or on rainy or cloudy days, so they should be grown in a sunny location as much as possible. Cold-sensitive varieties and autumn- or winter-flowering varieties are grown in greenhouses or frames, but summer-flowering varieties can also be planted in flower beds. They are propagated by bulb division. The genus name Oxalis comes from the Greek word for acid, as the sour juice comes out when the stems and leaves are chewed.

[Yoshiaki Hiragi May 19, 2020]

kinds

O. pes-caprae L. ( O. cernua Thunb.) is native to the Cape of South Africa, and in spring it produces 3 to 8 yellow flowers at the top of a 20 cm flower stalk. In autumn, it is planted in 3 bulbs in a 4- or 5-inch pot and cultivated in a frame. O. variabilis Jacq. is native to the Cape, and from November to the following spring, it produces flowers with a diameter of about 4 cm. There are three types of flowers: pink, red, and white. It is potted in September and cultivated in a frame. O. brasiliensis Lodd. is native to Brazil, and is relatively resistant to cold, so it can be planted outdoors. When planted in autumn, it produces deep purple-red flowers with a diameter of 1 to 2 cm around May. O. hirta L. is a stem species native to South Africa. When planted in autumn and cultivated in a greenhouse or frame, it produces red flowers from November to February of the following year. In warm areas, it can also overwinter outdoors. O. bowieana Lodd. is native to the Cape and, when planted in spring, produces deep red flowers 2-3 cm in diameter from summer to autumn. It is a hardy plant with strong cold resistance. O. debilis var. corymbosa (DC.) Lourteig ( O. martiana Zucc.) is native to South Africa and is cold-resistant. When planted in spring, it produces many small pink flowers from June to October. O. lobata Sims is native to Chile and is cold-resistant, producing yellow flowers from autumn to the following spring. O. deppei Lodd. is native to Mexico and has four leaflets with brown spots in the center.

[Yoshiaki Hiragi May 19, 2020]

Oxalis cernua
Native to South Africa. A large species that produces 3 to 8 yellow flowers at the top of the flower stalk. The leaflets are obtuse and deeply lobed, with dark spots on the surface. Flowering season is spring. ©Seishohmaru ">

Oxalis cernua

Oxalis variabilis
Native to South Africa. It grows to a height of 5-20cm, with round or obovate leaflets. Its flowers come in white, pink, and red, with yellow centers. They bloom one after another from November until the following spring. ©Seishohmaru ">

Oxalis variabilis

Oxalis dippei
Native to Mexico. It has four leaflets with brown spots in the center. It grows flower stalks and bears small pink flowers in a scattered pattern. ©Seishohmaru ">

Oxalis dippei

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

カタバミ科（APG分類：カタバミ科）の球根草。世界中に自生種があり、観賞用には熱帯アメリカ、アフリカ原産のものが十数種栽培されている。球根は匍匐(ほふく)性の根茎もしくは鱗茎(りんけい)。花は夜間や雨天、曇天でしぼむので、できるだけ日当りのよい所で栽培する。寒さに弱い品種や秋咲き、冬咲き品種は温室やフレーム内で栽培するが、夏咲き品種は花壇にも植えられる。繁殖は分球による。オキザリスという属名は、酸を意味するギリシア語に由来し、茎葉をかむと酸っぱい汁が出ることからきている。

［平城好明　2020年5月19日］

種類

セルヌアO. pes-caprae L.（O. cernua Thunb.）は南アフリカのケープ原産で、春に約20センチメートルの花茎頂部に3～8個の黄色花をつける。秋に4、5号鉢に3球植えとし、フレーム内で栽培する。バリアビリスO. variabilis Jacq.はケープ原産で、11月から翌年の春まで、花径約4センチメートルの花を次々と開く。花色は桃、紅、白色の3種がある。9月に鉢植えしてフレーム内で栽培する。ブラジリエンシスO. brasiliensis Lodd.はブラジル原産で、寒さに比較的強く、露地植えも可能。秋に植えると5月ごろに1～2センチメートルの濃紫紅色花を開く。ヒルタO. hirta L.は南アフリカ原産の有茎種。秋に植え付け温室やフレーム内で栽培すると、11月から翌年の2月にかけて紅色花を開く。暖地では露地での越冬も可能。ボウイアーナO. bowieana Lodd.はケープ原産で、春に植え付けると、夏から秋にかけ花径2～3センチメートルの濃紅色花をつける。性質は強健で耐寒性も強い。マルチアーナO. debilis var. corymbosa (DC.) Lourteig（O. martiana Zucc.）は南アフリカ原産で、寒さに強く、春に植え付けると6～10月に桃色の小花を多数つける。ロバータO. lobata Simsはチリ原産で、寒さに強く、秋から翌年の春まで黄色花を開く。ディッペイO. deppei Lodd.はメキシコ原産で、小葉は4枚つき、その中央部に褐色の斑(ふ)が入る。

［平城好明　2020年5月19日］

オキザリス・セルヌア

オキザリス・バリアビリス

オキザリス・ディッペイ

出典　小学館　日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について　情報 | 凡例

<<: Oxaloacetic acid - Oxaloacetic acid

>>: Oxazole - Oxazole (English spelling)