No. Capsicum plants produce fruits like chili peppers, bell peppers, and others. Peppercorns are more like berries and are not in the same family as capsicum plants.
Capsicum plants have a substance that causes great heat called "capsascin". Peppercorns have a heat-producing substance called "piperazine".
Black peppercorns are the dried unripe fruit of an Indian native, the Piper negrum vine; green peppercorns are the same fruit, differently processed in order to retain their green color. White peppercorns are the seed with the outer fruit removed.
The Piper negrum, or black pepper vine, is a member of the Piperaceae family and isn't related to any of the capsicum family; the genus Capsicum - which includes bell peppers (also known as capsicums) and chili peppers is a member of the family Solanaceae.
Black pepper
Try white peppercorns, or if you cannot find them, ordinary black peppercorns.
Black peppercorns or a combination of black pepper and cardamom can be used as substitutes for Grains of Paradise, as they have similar spicy and peppery notes. White peppercorns can also be used as a milder alternative.
Black pepper can be served as whole peppercorns, and coarsely or finely ground.
Both black & white pepper originate from the same source. They come from the peppercorns of the plant pepper nigrum. The difference is in the way they are harvested. Black pepper comes from peppercorns that are harvested when green & allowed to dry in the sun until they blacken. White pepper comes from peppercorns that are allowed to ripen fully before picking & then are soaked in water to remove the outer hull.
Black pepper consists of ground dried peppercorns, which are the tiny fruits of the pepper plant Piper nigrum.
Peppercorns are berries harvested when ripe and then dried. White pepper is a black peppercorn with the outer covering soaked or washed off.
Pepper seeds (or peppercorns) are not poisonous. They are ground to make ground white or black pepper. Pepper seeds from vegetables in the capsicum family are not poisonous either.
Lemon pepper is a seasoning made from granulated lemon zest and cracked black peppercorns. See the related link below for more information.
"Crushed pepper" is typically a reference to crushed red pepper or red pepper flake. This is a condiment made of crushed, dried red chili peppers. It could also refer to crushed black or white peppercorns.
Cracked pepper is made from peppercorns which have been broken apart or "cracked," but are still relatively large. Ground pepper is made from breaking down or "grinding" peppercorns further, such that the particles are made finer.
Milled black pepper refers to black peppercorns that have been ground or crushed into a fine powder. It is a commonly used spice to add flavor and heat to dishes, and is one of the most popular and versatile spices worldwide.