Item #: SCP-199
Object Class: Euclid
Special Containment Procedures: SCP-199 is to be contained in a twenty meter cubical chamber with artificial light suitable for plant growth. Instances of SCP-199-2 are to be captured by Class D personnel wearing Level A / Type 1 Hazmat suits with SCBA before ripening. Instances of SCP-199-2 are to be placed in a one cubic meter sealed plexiglass container with ten liters of potting soil until ripened and the spores are released. Once spores are released, the plexiglass container is to be vented with the resultant chemicals either harvested or neutralized. New growth is to be brought into containment with other instances of SCP-199.
Description: SCP-199 is a unknown fern of the Hymenophyllaceae family, related to filmy ferns but far more tolerant of changes in temperature and humidity. The rhizomes of the plants are hardy and can attach and grow on most any solid surface, even within chimneys and on smooth walls. The rhizomes and roots of the plant appear similar to thallose liverworts, but the fronds are entirely unique to the plant. The fronds form into bladders approximately 10 cm in diameter, and will inflate with hydrogen and drift away from the main plant.
The bladders, designated SCP-199-2, will float in the air and ripen over several days while the bladder absorbs energy through photosynthesis. During this time the spores carried by SCP-199-2 will mature, and the bladder's contents will change to [DATA EXPUNGED]. This compound has properties reminiscent of combined defoliants and nerve agents such as Sarin or ██████.
When ripe, SCP-199-2 will burst open, expelling its contents and releasing the spores in an area approximately ten meters wide. Everything within the area will be coated with spores and the contents of the bladder, resulting in [DATA EXPUNGED]. The gametophytes will be nourished by the resultant materials, and the cycle will continue.
Addendum 199-a: SCP-199 was first discovered in the ██████ Province of the People's Republic of China, where several instances were seen growing within the chimneys of manufacturing plants, steel mills, and coal-fired power plants. Several deaths due to unknown pollutants caused local investigators to look into the matter, which led to the Foundation being contacted.
SCP-199 is strongly resistant to most defoliants, and seems to thrive in polluted environments. However, due to the plant using an unknown catalytic process to separate out hydrogen gas from water, SCP-199 reacts to fire explosively, and can be controlled through careful burning. Uncontrolled burning can result in collateral damage as well as premature release of [DATA EXPUNGED]. Personnel charged with defoliation should wear airtight masks beneath fire-resistant Level A / Type 1 Hazmat suits. Foundation medical personnel should be ready to administer ██████ to affected agents as soon as possible, with immediate termination being the alternative if unavailable.
All casualties shall be disposed of by incineration within four hours of exposure, unless overridden by O5 orders.
Addendum 199-b: As an alternate means of control, several species of insects were introduced to SCP-199. In every case the insects died soon after exposure to either the plant or upon attempting to consume it. The precursors of [DATA EXPUNGED] act as a very effective pesticide, and research on how to safely harvest them as well as [DATA EXPUNGED] for neutralization of plant or arthropod SCPs is ongoing.
Addendum 199-c: Recent intelligence suggests involvement by the Chaos Insurgency concerning either the manufacture or distribution of SCP-199. Evidence points to an artificial origin, and the use of SCP-199 as a weapon of ecoterrorism by unknown agencies appears likely.