Hypericum sechmenii is a perennial herb that usually grows in clusters of stems 3–6 centimeters (1–2 inches) tall and blooms in June and July.

Despite containing druse crystals and toxic chemicals that are thought to deter herbivory, the species is threatened by overgrazing from livestock, as well as by other factors like climate change and habitat loss.

[5] The numerous smooth and hairless stems[3] of Hypericum sechmenii have multiple layers of different kinds of cells.

Some cells in the periderm of the stems also contain inorganic minerals known as druse crystals,[6] which a 2020 paper theorized might deter herbivory because of their toxicity.

[8] On the top and bottom sides of the leaves there are pores (stomata) that regulate gas exchange, and there is tightly packed photosynthetic tissue just below the epidermis.

The specialized bract leaves, which surround the flowers, are long and have glands and small hairs called cilia.

The leafy structures that provide support for the petals, called the sepals, are roughly 0.2 cm (0.08 in) long, are an oblong shape, and can either be pointed or rounded.

The seeds themselves have tiny, regularly spaced pits that form patterns similar in appearance to small lines or ladders.

[3][12] When compared to Hypericum minutum and H. huber-morathii, H. sechmenii has differences in its leaves, flowers, and pollen grains.

The holotype of the species was collected in that same year by Ocak in the district of Günyüzü and is now housed at Eskişehir Osmangazi University.

[3][14] Three years later, in December 2009, the species was formally described by Ocak and Onur Koyuncu in the journal Annales Botanici Fennici.

The authors gave the species the specific epithet sechmenii as an homage to the prominent Turkish taxonomist and ecologist Özcan Seçmen.

[18] Specifically, the species has been found in central Turkey within Eskişehir Province,[15][19] at two separate localities: one near the peak of Arayit Mountain, and the other between the towns of Kaymaz and Sivrihisar.

[2][3] Several other specimens of Hypericum sechmenii have been collected since the species' discovery and are preserved at various Turkish herbariums.

[21] The leaves of Hypericum sechmenii contain xeromorphic stomata, pores that have adaptations to allow the plant to better survive in its arid, steppe habitat of Central Anatolia,[23][24] defined as the Irano-Turanian floristic region.

[7] Hypericum sechmenii grows alongside small shrubs and perennial herbs like stonecress (Aethionema subulatum), woodruff (Asperula nitida), harebell (Asyneuma compactum), small toadflax (Chaenorhinium minus), Kotschy's damask flower (Hesperis kotschyi), flax (Linum cariense), restharrow (Ononis adenotricha), dandelions (Scorzonera tomentosa), Turkish catchfly (Silene falcata), and wood betony (Stachys lavandulifolia).

[26] Propagation of Hypericum sechmenii is undertaken by planting seeds in the spring, barely covering them in soil.

The species is under threat from both abiotic factors, especially climate change, as well as human impact from agriculture and the grazing of domesticated animals.

Because of these threats and the unsustainably small population size of Hypericum sechmenii, biologists from the Eskişehir Osmangazi University recommended that the species be classified as Critically Endangered by the International Union for Conservation of Nature, although no conservational measures had been taken as of 2013[update].