Definition
Per stirpes (Latin: "by the roots" or "by the stocks") is a method of distributing an estate — whether by will, intestate succession, or beneficiary designation — in which descendants of a deceased heir divide and inherit only the share that their deceased ancestor would have received, rather than sharing equally in the whole estate alongside surviving heirs at the same generational level.
The essential mechanism: the estate is first divided at the nearest generation of heirs. If a member of that generation has predeceased the decedent, that member's share passes down to their own descendants collectively, who split it equally among themselves. This process repeats down each branch of the family tree as needed.
Example: A decedent has three children — Alice, Bob, and Carol. Bob predeceased the decedent and left two children (grandchildren of the decedent). Alice and Carol each take one-third of the estate. Bob's two children together inherit Bob's one-third share, each receiving one-sixth. They inherit "by representation" of Bob, not as independent heirs standing alongside Alice and Carol.
Common Language
Modern common usage (Wiktionary): "A method of distributing an estate to the descendants or heirs of a deceased legatee in which the estate is divided equally among the branches of a family or designated heirs, without regard to differing numbers of people in different branches."
Historical common usage (Webster's 1913): Not listed as a common English term. Per stirpes remained a term of legal and civil law usage without meaningful crossover into ordinary English vocabulary.
The Wiktionary definition is broadly accurate but glosses over the most research-critical distinction: per stirpes divides at the first generational level where living heirs exist, meaning the initial split happens there regardless of how many living descendants exist below. This differs from per capita with representation, a modern variant that recalculates the initial division point differently. The common definition makes these two methods sound identical when they are not.
Common Confusion
Per stirpes is frequently confused with two related but distinct distribution methods:
Per capita: Each surviving heir at the same generational level takes an equal share of the whole estate. No representation of deceased ancestors occurs. If Bob predeceased the decedent in the example above, his children would take nothing under a strict per capita scheme.
Per capita with representation (sometimes called "per capita at each generation"): Like per stirpes, this method allows descendants to step into a deceased ancestor's place. The critical difference is that shares for members of the same generation are pooled and redistributed equally among all of them, regardless of which branch they come from. This produces different results when multiple members of the same generation have predeceased the decedent. Many modern statutes — including the Uniform Probate Code — default to per capita with representation rather than classical per stirpes, making it essential for researchers to identify which rule a jurisdiction applies.
The phrase "by representation" appears in both per stirpes and per capita with representation schemes, which compounds the confusion. Historical sources use "by representation" as a near-synonym for per stirpes; modern sources often use it differently.
Why It Matters in Research
Statutory default rules vary and have shifted. Older common law and many traditional statutes treated per stirpes as the default method of intestate distribution. The Uniform Probate Code (in its 1990 revisions) moved to per capita with representation as the default, and states that adopted revised UPC provisions may have quietly replaced classical per stirpes with this modern variant. Researchers reading cases or statutes without attention to the enactment date may incorrectly assume the jurisdiction follows classical per stirpes.
Wills and beneficiary designations are a separate hazard. When a testator or plan participant designates a beneficiary "per stirpes," courts and plan administrators must interpret what that phrase means under the applicable jurisdiction's law at the time of interpretation — not necessarily at the time the document was drafted. A will drafted in 1970 using "per stirpes" may be interpreted under a statutory framework that has since changed its default rule.
The phrase appears in non-probate instruments too. Retirement plan beneficiary designations, life insurance policies, and trust documents frequently use per stirpes language. The meaning can vary depending on whether ERISA, state insurance law, or state trust law controls interpretation.
Historical cases using per stirpes often arise in intestacy disputes where the specific generational starting point of the division is contested. Researchers should look carefully at whether the court is counting from the decedent's children, from the nearest generation with surviving members, or applying some other rule — these produce materially different results.
Corpus navigation tip: Cases using "by representation" as a descriptor in older reporters are almost always discussing what modern lawyers call per stirpes distribution. Do not assume "by representation" signals a distinct legal concept in pre-twentieth century sources.
Historical Dictionary Support
The historical sources agree on the core definition and share a common civil law pedigree. Black's (both editions), Burrill, and Rapalje & Lawrence all define per stirpes as distribution "by roots or stocks" with representation of a deceased ancestor's share — the classical formulation is stable across these sources.
Burrill is the most substantive, situating the term explicitly in both English and American law and citing Blackstone (2 Bl. Com. 217–218) and Kent (2 Kent's Com. 425; 4 Kent's Com. 390–392), which remain useful entry points for the historical doctrine. Rapalje & Lawrence's entry is characteristically brief, functioning primarily as a cross-reference signal rather than a definition.
What the historical dictionaries miss: none of them anticipate the modern per capita with representation variant or the statutory divergence that would follow UPC reform. A researcher relying solely on these sources would have no warning that "per stirpes" might mean something different — or be superseded by a different default — under contemporary statutes. The historical sources also do not address the use of per stirpes language in non-probate instruments, which is now a major area of practical and litigation significance.
Jurisdictional Note
States diverge significantly on whether classical per stirpes or per capita with representation serves as the intestate default. States that adopted the revised Uniform Probate Code generally follow per capita with representation; many non-UPC states retain classical per stirpes. When interpreting a will or trust that uses per stirpes language without further definition, courts apply the law of the jurisdiction governing the instrument, which may or may not match the drafter's intent.
Encyclopedia Cross-Reference
No Law Mind Encyclopedia entry directly addresses per stirpes or succession law. The matched entries (negligence per se, the Takings Clause per se rules, and defamation per se) share only the Latin particle "per se" and are not relevant to this term.