holy basil

Japanese: holy basil（英語表記）holybasil

…A perennial plant that is worshipped as a sacred herb by Hindus, especially Vaishnavas. Ocimum tenuiflorum L. (= O. sanctum L.), a type of basil in the Lamiaceae family, is called sacred basil or holy basil. It branches out well, grows 30-60cm tall, and the base of the stem can become woody.

From [Basil]

...The black-leaved species, Dark Opal, can add a touch of black color to flower beds. In India and Southeast Asia, in addition to basil, other species such as O. gratissimum L. (shrubby basil, tree basil), O. kilimandscharicum Guerke (camphor basil), O. canus Sims (hoary basil), and O. tenuiflorum L. ( sacred basil , holy basil) are also used. [Eiichi Asayama]
[Folklore, Symbolism]
In Europe, basil is a symbol of the grave.

*Some of the terminology that mentions "holy basil" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヒンドゥー教，とくにビシュヌ派の人々が聖草とし崇拝の対象とする多年草。シソ科のメボウキの一種のカミメボウキOcimum tenuiflorum L.(＝O.sanctum L.)で，英名sacred basil,holy basil。よく枝分れし，高さ30～60cm，茎の基部は木質化することがある。…

【メボウキ】より

…黒葉種Dark Opalは，花壇に黒色の彩りを添えることができる。　インドや東南アジアではメボウキのほかにO.gratissimum L.(英名shrubby basil,tree basil)，O.kilimandscharicum Guerke(英名camphor basil)，O.canus Sims(英名hoary basil)，カミメボウキO.tenuiflorum L.(＝O.sanctum L.)(英名sacred basil,holy basil)などの種が同様に利用されている。【浅山英一】
［民俗，象徴］
　メボウキはヨーロッパでは墓の象徴とされる。…