- "Monument" by Lloyd Biggle, Jr. [Analog Jun 1961]
- "Scylla's Daughter" by Fritz Leiber [Fantastic May 1961]
- "Status Quo" by Mack Reynolds [AnalogAug 1961]
- "Lion Loose" by James H. Schmitz [AnalogOct 1961]
A series of stories winning a short fiction category would be impossible today, but in the early days, the Hugo rules were much less detailed and were administered more loosely. In this case, in response to the protests this caused, the Chicon III committee announced that during the nomination stage, they had counted ballots which said "any story in the Hothouse series", allowing the series onto the final ballot. And apparently the voters liked the series better than the other four stories on the ballot.