Akwai tsirrai da yawa da ba safai a Arewacin Amurka waɗanda ke gab da ƙarewa ba. Yana buƙatar ƙoƙari mai yawa don kiyaye su.
Agave
Agave na Arizona shine mai nasara wanda yake da ɗan gajeren tushe; wasu tsire-tsire basu da shi kwata-kwata. Har zuwa karni na 20, akwai sama da nau'in agave dari, amma a yau 2 ne kawai suka rayu a Arizona.
Dutsen Hudsonia
Wani abin tarihi shi ne tsaunin Hudsonia, wanda ba kasafai ake samun hakan ba a wasu yankuna na Arewacin Carolina, kuma yawan tsirrai bai wuce dari ba. Za a iya samun wasu gungun gungu a cikin Pisgash Park.
A cikin jihohi biyar na Arewa maso yamma, zaka iya samun orchid na yammacin tudu. Yawan jama'a na raguwa saboda gobara, kiwon dabbobi da dumamar yanayi.
Nolton's mai amfani mai amfani
Nolton's succulent pediocactus yana da tushe mai tsayi 25 mm da ƙananan furanni masu launin ruwan hoda-fari. Ganye yana da ƙarami kaɗan, kuma ba a kafa lambarsa ba.
Shuka ta Astra Georgia tana da kyawawan furanni. A da, yawan jama'a suna da yawa, amma fiye da shekaru 10 wannan nau'in ba safai yake ba kuma yana buƙatar kariya daga halaka.
